JPS6071408A - Pallet conveying device - Google Patents

Abstract

PURPOSE:To make a pallet feedable intermittently at high speed as well as to make it stoackable at need, by installing a coupling claw in the pallet, while making this claw connectible to a chain subject to intermittent feed detachably. CONSTITUTION:A conveying device is constituted of a coupling device 8 for a pallet 6 and a chain 7, a cutoff device 9 releasing the coupling between both 6 and 7, and each of turning devices 10-13 turning the pallet at a corner part, etc. And, the pallet 6 first carries out coveyance with continuous conveying chains 14 in two rows and, after a turnabout takes place by a turning device 10, is coupled with a chain 7 intermittently fed by the coupling device 8. At this time, a coupling claw 19 of the pallet 6 is made to engage with a space between rollers of the chain 7. Next, the pallet 6 is disjoined from the chain 7 by a cutoff device 9 and, after it is conveyed again by the chain 14, made into stick C at discretion.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a conveying device for a pallet jig on which parts and products are carried on a parts processing and product assembly line.

Structure of the conventional example and its problems As shown in FIGS. 1 and 2, the conventional pallet conveying device has a concrete structure. In FIG. I was doing it. However, the above configuration has the drawback that it does not require a large number of pallets, and moreover, pallets cannot be stocked as a buffer.

In addition, in Fig. 2, by placing a roller chain 4 on a chain guide 3 and continuously feeding the chain, a pallet placed on rollers 5 rotatably attached to both sides of the chain is freely conveyed. Ru. However, although the above configuration solves the problem of stacking a certain number of pallets, it has the disadvantage that when pallets need to be sent at high speed, rolling occurs between the rollers and the pallets, making it impossible to follow the speed of the chain. had.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention aims to combine the characteristics possessed by each of them, and provides high-speed followability when engaged with a chain and stock function when freely conveyed on a roller chain. It provides the following benefits:

Structure of the Invention The pallet conveying device of the present invention is composed of a connecting pawl provided on the bottom of the pallet, a spring that presses the pawl in a certain direction, and a roller chain device that engages with the connecting pawl, and is capable of high-speed conveyance. In areas where pallets are meshed with chains that are transported intermittently, and in areas where pallets need to be stocked to balance the tact between processes, they are transported on a chain that can be separated from the intermittent transport chain and is freely transportable. It was made so that it could be done.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 shows an overall plan layout of a pallet conveying device in an embodiment of the present invention. In Fig. 3, 6 is a pallet, 7 is a chain that is fed intermittently and meshes with the connecting claw of the pallet, 8 is a connecting device that meshes the balent with the connecting claw of the chain, and 9 is the mesh of the pallet with the connecting claw of the chain. Detachment device for removing, 10, 11.12.13
Reference numeral 14 indicates a turning device that rotates the pallet at a part of the corner, 14 indicates a chain in which the valent is freely rolled on the rollers of the chain and is continuously conveyed, and 15, 1 eiii indicates a guide that guides the side of the pallet.

In FIGS. 4 and 5, 17 is a U-shaped metal fitting attached to the bottom of the pallet, 18 is a shaft attached to the metal fitting, 19 is a connecting claw slidably attached using the shaft as a guide, and 20 Reference numeral 21 indicates a compression spring for pressing the connecting claw against one side of the metal fitting, 21 indicates a pilot bin for positioning the pallet, and 22 indicates a guide rail for slidingly guiding both sides of the pallet.

In FIG. 6, reference numeral 23 indicates a chain guide that supports and guides the lower part of the intermittent conveyance chain, and 24 indicates a chain guide that supports and guides the lower part of the chain that is intermittently returned.

7 and 8 show a device for separating the pallet from the chain, and the connecting device also has the same construction.

25 is a chain that is fed intermittently; 26 is a pallet; 27
is a connecting claw, 28.29 is a guide on both sides of the pallet, 3
0.31 is a continuous drive chain that receives the bottom surface of the pallet and freely conveys it; 32 is a motor that drives the double drive chain; 33 is a sprocket that drives the intermittent drive chain; 34° and 35 are the guides on both sides. Vertical shafts are respectively attached via brackets 36 and 37, 38 and 39 are guides, 40 and 41 are rollers, 42 and 43 are levers with fulcrums at 44 and 45, 46 is a connecting rod, and 47 is the lever 43 The cylinders that provide rocking drive are shown respectively.

Regarding the pallet conveying device configured as shown below,
The operation will be explained below. First, the pallet, which has been freely conveyed on two rows of continuous conveyance chains, is placed in the turning device 1.
The direction is changed at o, and then at 8 the pallet is connected to a chain 7 which is driven intermittently. This connecting operation is performed by driving the levers 42, 43 by the cylinder 47, lowering the side guides 28', 29 via the rollers 40° 41 and the guides 38, 39, and lowering the connecting claws 19 attached to the lower surface of the pallet. is engaged between the rollers of a chain 7 that is intermittently fed, and the pallet is conveyed in accordance with the drive of the chain. The pallet is positioned by pressing the pilot bin 21 with the ■-shaped groove so that the pallet overcomes the force of the compression spring 2o and moves from position a to position b. Reference numeral 9 denotes a device that separates the pallet from the chain that is fed intermittently, and in the opposite direction to the above-mentioned connecting operation, the guides 28 and 29 on both sides are moved upwardly via the levers 42, 43, connecting rod 46, etc. by the drive of the cylinder 47. As a result, the pallet connecting claw is separated from the chain roller. After being separated, the pallets are again freely conveyed on the two rows of continuous conveyance chains, and when pallet stock is required, the pallets are arranged as shown in C in FIG.

As described above, according to this embodiment, it is possible to mix production processes in one production line at high speed with a constant tact and processes that are not tied to the production tact to some extent within the same line. , it is possible to assemble a system that matches the production format.

Effects of the Invention As described above, the present invention includes a connecting pawl provided on the bottom of a pallet, a spring that presses the pawl in a certain direction, a roller chain that meshes with the connecting pawl, and a connecting device for the chain and the connecting pawl. By installing a separating device, pallets can be conveyed intermittently at high speed with a constant tact by interlocking with an intermittent feed chain in a certain process range. In the process range where pallets need to be stocked, they can be sent on flexible rollers that are continuously conveyed, making it possible to configure a system that is optimal for the production format without increasing the number of pallets more than necessary. There is a practical effect called a dog.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a conventional example, Fig. 2 is a front view showing the same conventional example, Fig. 3 is an overall plan view showing an embodiment of the present invention, Fig. 4 is a plan view of an open part, 6 is a front view of the same portion, FIG. 6 is a sectional view of the same portion, FIG. 7 is a plan view showing the connection and separation portion, and FIG. 8 is a front view of the same portion. 6... Palette, 18... Guide, 19...
...Connecting claw, 20...Spring, 7...-Roller chain. Name of agent: Patent attorney Toshio Nakao (1st person)
Figure 2 Figure 3

Claims (1)

[Claims] A balent conveyance device that circulates pallet jigs linearly and horizontally, the device comprising: a connecting tab slidably guided by a guide provided on the bottom of the pallet; a spring pressing the connecting tab in a certain direction; and the connecting tab. A connecting device having a roller chain that engages with a pawl at a roller part and is fed intermittently at a constant pitch, a pallet lifting section that engages the connecting pawl with the roller chain, and a pallet that removes the connecting pawl from the roller chain. A pallet conveying device comprising a separating device having an elevating section.