JPH06345233A - Double-speed conveyor and continuous processing device equipped therewith - Google Patents

Abstract

PURPOSE:To provide a double-speed conveyor which can perform smooth transfer without generating jamming of the transferred article and the reduction of the transfer speed, at the conveyor edge, during the transfer between the double-speed conveyors. CONSTITUTION:A guide rail 8 consists of a horizontal part 13 parallel to a transfer passage and a curved part 14 for winding-laying a chain extending downward from both edges of the horizontal part 13, and a pallet A which is transferred at the transfer speed in 2.5 times of the chain speed on the horizontal part 13 is transferred at the transfer speed in 2.5 times of the chain speed along the curved part 14 for winding-laying the chain, without being applied with a brake force at both edges of the conveyor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double speed conveyor and a continuous processing apparatus having the same.

[0002]

2. Description of the Related Art As shown in FIGS. 5 and 6, a guide rail (48), inner and outer link plates (42) and (43), a pin (44) connecting them, and a connecting pin (44) are passed through. And the transported object
A large-diameter roller (46) for conveyance on which (A) is placed, and a small-diameter roller (47) arranged concentrically with the large-diameter roller (46) and rolling on the guide rail (48). An endless chain (1) in which both rollers (46) and (47) rotate together when the weight of (A) is applied to the large diameter roller (46).
And a drive sprocket (9) that drives the endless chain (1)
Double speed conveyors having and are conventionally known. This type of double speed conveyor has a drive sprocket (49) at one end.
However, a driven sprocket (50) is provided at the other end.

Further, this type of double speed conveyor is designed so that a desired process condition is realized when an object to be processed is conveyed while passing through the apparatus while being loaded on a pallet.
It is often used in continuous processing equipment that can set the ambient environment (temperature, atmosphere composition, liquid composition, process parameters such as pressure, etc.) spatially along the conveyance direction of the object to be processed.

[0004]

In the above-mentioned conventional double speed conveyor, since the small diameter roller does not rotate apart from the guide rail in the sprocket portion, the conveying speed is equal to the chain speed. Therefore, when these are continuously arranged and used, the pallet (object to be conveyed) which has been conveyed on the rail at a conveying speed of 2.5 times the chain speed, for example, has a braking force when it reaches the sprocket part. Receive. The degree of brake application is affected by the flatness of the pallet and the level difference between the chain on the sprocket and the chain on the guide rail.However, there is a limit to improving the flatness of the pallet and the accuracy of the levels of the sprocket and guide rail. Therefore, pallet hiccups and rotations occur irregularly due to uneven braking. If the length of the conveyed object in the longitudinal direction of the conveyor is smaller than about twice the length of the sprocket part in the longitudinal direction of the conveyor, the conveyed object is rapidly decelerated, and as a result, when transferring between the double speed conveyors. There have been problems that the transported object is clogged and the time required for transfer is long.

An object of the present invention is to provide a double speed conveyor which is capable of smooth transfer without clogging of the object to be conveyed or a decrease in the transfer speed at the end of the conveyor at the time of transfer between the double speed conveyors, and a continuous machine equipped with the double speed conveyor. It is to provide a processing device.

[0006]

A double speed conveyor according to the present invention comprises a guide rail, an inner and outer link plates, a pin connecting them, a large-diameter roller for carrying the object to be carried, which is passed through each connecting pin, and It has a small-diameter roller that is arranged concentrically with the large-diameter roller and rolls on the guide rail, and both rollers rotate together when the weight of the transported object is added to the large-diameter roller. In a double-speed conveyor equipped with an endless chain and a drive sprocket for driving the endless chain, a guide rail is composed of a horizontal portion parallel to the conveying path and a chain winding curved portion extending downward from both ends of the horizontal portion. The sprocket is arranged below the guide rail.

A continuous processing apparatus equipped with a double speed conveyor according to the present invention includes a guide rail, inner and outer link plates, pins for connecting them, a large-diameter roller for conveyance through which each of the connecting pins is placed and an object to be conveyed is placed, and It has a small-diameter roller that is arranged concentrically with the large-diameter roller and rolls on the guide rail, and both rollers rotate together when the weight of the transported object is added to the large-diameter roller. A plurality of double speed conveyors having an endless chain and a drive sprocket for driving the endless chain are continuously arranged at intervals, and while a workpiece is sequentially conveyed by these conveyors, heat treatment, In a continuous processing device that performs processing such as drying and cleaning, the guide rails of each conveyor have a horizontal part that is parallel to the transport path and a chain that extends downward from both ends of the horizontal part. Becomes more curved section for multiplying the drive sprocket of each conveyor is characterized in that it is arranged below the guide rails.

[0008]

In the double speed conveyor according to the present invention, the guide rail is composed of a horizontal portion parallel to the conveying path and a chain winding curved portion extending downward from both ends of the horizontal portion, and the drive sprocket is arranged below the guide rail. Therefore, at both ends of the guide rail, the small diameter roller is pressed against the curved portion of the guide rail to roll.
Therefore, the conveyance speed does not decrease even at both ends of the conveyor, and abrupt braking force does not act on the conveyed object.

In the continuous processing apparatus equipped with the double speed conveyor according to the present invention, the guide rail of each conveyor comprises a horizontal portion parallel to the conveying path and a chain winding curved portion extending downward from both ends of the horizontal portion. Since the drive sprocket of the conveyor is arranged below the guide rail, the small-diameter rollers are pressed against the curved portion of the guide rail to roll at both ends of the guide rail of the double speed conveyor. Therefore, the conveying speed does not decrease even at both ends of the conveyor.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show a double speed conveyor according to the present invention, in which a double speed roller (5) is passed through a pin (4) connecting inner and outer link plates (2) and (3). It has an endless chain (1) and a guide rail (8). Bush between pin (4) and double speed roller (5)
(12) is interposed.

The double speed roller (5) is a large diameter roller (6) for conveyance.
And a pair of small-diameter rollers arranged so as to sandwich this
The large-diameter roller (6) is provided with cylindrical protrusions (6a) protruding on both sides on the inner peripheral surface of the large-diameter roller (6), and each protrusion (6a) has a small-diameter roller (7a). ) Is fitted. Each small-diameter roller (7) is supported on the guide rail (8), and the large-diameter roller (6) is fitted in an annular groove (8a) provided on the outer periphery of the guide rail (8). The conveyed material is supported by a large-diameter roller (6). Pallet (A) is a large diameter roller
When the endless chain (1) is driven while being placed on (6), each small diameter roller (7) is pressed against the guide rail (8) and rolled. Further, a frictional force acts between the large diameter roller (6) and the small diameter roller (7), and both rollers (6) and (7) rotate integrally.

When the small diameter roller (7) is rolled on the guide rail (8), the diameter of the large diameter roller (6) and the small diameter roller (7)
The peripheral speed of the large diameter roller (6) increases at a speed ratio according to the diameter ratio of the diameter of the endless chain (1), and the peripheral speed of the large diameter roller (6) is added to the speed of the endless chain (1). 2.5 times the pallet
(A) can be transported. Since the power required to operate the conveyor is proportional to the chain speed, it can be operated with one-half the power of a general chain conveyor.

The guide rail (8) is composed of a horizontal portion (13) parallel to the conveyance path and a substantially semi-circular curved portion (14) extending downward from both ends thereof. The endless chain (1) is wound around these curved portions (14).

Drive and driven sprockets (9) (10) (11)
Is located on the return side of the endless chain (1). That is, the endless chain (1) wound around the curved portion (14) at the left end of the guide rail (8) is hung on the upper side of the driven sprocket (10) on the return side and then under the drive sprocket (9). Side of the guide rail (8) and the return rail guide (1) provided in front of the curved portion (14) at the right end of the guide rail (8).
After passing through 5), it is wound around the curved portion (14) at the right end of the guide rail (8).

The small-diameter roller (7) is pressed against the guide rail (8) not only in the horizontal portion (13) of the guide rail (8) but also in the curved portion (14) of the guide rail (8) to roll. To be made. Therefore, even if the length of the conveyed object (A) in the longitudinal direction of the conveyor is smaller than about twice the length of the curved portion (14) in the longitudinal direction of the conveyor, the conveying speed at both ends of the conveyor should decrease. There is no sudden braking force on the pallet (A).

In the above double speed conveyor, the pallet
When (A) is stopped by the stopper, the large diameter roller (6)
Is idle and the pallet with the endless chain (1)
(A) can be paused, that is, accumulated.

FIG. 4 shows a continuous processing apparatus equipped with a double speed conveyor according to the present invention. This equipment is a continuous processing equipment that performs surface treatment (coating and drying) with organic materials on the surface of office equipment components. The area to be coated and dried is a hazardous area that uses organic solvents and is a clean room. Therefore, the room separation shutter (2
It is isolated by 5).

The pallet (A) carried by the first conveyor (21) from the antechamber is first stopped by a stopper (26) provided at the end of the first conveyor (21). Then, the room isolation shutter (25) is opened, and the pallet (A) is carried into the coating treatment area (27) by the second conveyor (22). The pallet (A) is stopped by a stopper (26) provided at the end of the second conveyor (22), and the pallet (A) is stopped.
The work on the top is coated. After this, the pallet
(A) is carried into the drying furnace (29) by the third conveyor (23) of the line switching device (28). The drying oven (29) has an entrance shutter for the purpose of preventing outflow of dangerous atmosphere and heat diffusion.
(30) is provided. In the drying oven (29), the processing is performed in two rows to reduce the installation space, and the line switching machine
(28) makes the distribution. After switching, the pallet (A) is stopped by the stopper (26) provided at the end of the third conveyor (23) until the entrance shutter (30) of the drying oven (29) is opened. The pallet (A) is stopped by the stopper (26) provided at the end of the fourth conveyor (24) arranged in the drying oven (29), and after the drying time has elapsed, the drying oven (29)
It is sent to a post process (not shown) provided on the exit side of the. Depending on the throughput, it can be easily imagined that a single-row drying oven is adopted, but in that case, the line switching device (28) is not necessary, and it can be simply removed or replaced by It is also possible to install the inventive conveyor.

The fourth conveyor (2) arranged in the drying oven (29)
As the double-speed roller of 4), a commercially available engineering plastic has a heat resistance temperature of 80 ° C., and since heat resistance is insufficient, a roller made of a polyimide resin having a heat resistance of about 200 ° C. is used.

By the way, in the process of assembling electronic parts, general industrial equipment and the like, and in the heat treatment process, the processing tact time is generally fixed, and the apparatus used therefor performs tact (intermittent) operation. Even in a conveyor device, it is customary to process by tact feeding, but there is a problem that the device configuration is limited because the size of the device is specified as a multiple of the tact distance and the stop position cannot be selected arbitrarily. It was

In the above continuous processing apparatus, the pallet
When (A) is stopped by the stopper (26), the pallet (A) can be accumulated while the endless chain is continuously movable. As a result, transportation and stopping work can be performed simultaneously on the same conveyor. Therefore, there is no limitation due to the tact distance, the device can be stopped and stayed at an arbitrary stopper position, and the device can be downsized and the configuration can be facilitated. In addition, as a secondary effect, when a trouble occurs in the downstream of the production line, all the pallets (A) on the same conveyor in the tact feeding system stop, whereas the trouble upstream continues. Since the treatment can be performed, it is possible to reduce the defect rate and the loss time.

In the above-mentioned embodiment, the material of the double speed conveyor may be heat resistant steel or ceramic in the case of high temperature use, in addition to ordinary metal, and in the case of use in a corrosive environment, a corrosion resistant material such as resin or corrosion resistant metal. Or ceramic,
Alternatively, it may be a complex of these. When engineering plastic is used as the double speed roller, the noise can be reduced by 15 dB as compared with the conventional chain with the side roller and the top roller chain. Further, since the noise value (sliding noise) and the dust generation amount are proportional to each other, it can be said that the dust generation amount is also reduced, which can improve the working environment and make the device clean.

In the above-mentioned continuous processing apparatus, the coating and drying processing apparatus for office photosensitive equipment parts has been described. However, in the continuous processing apparatus provided with the double speed conveyor according to the present invention, a plurality of double speed conveyors are arranged at intervals. A plurality of conveyors, at least one of which is provided with a processing area defined so as to include at least a transfer surface and a small space above the conveyor surface; , Heat treatment, baking, etc.
It can be used in a continuous processing apparatus for the purpose of processing such as washing, painting, drying, curing, electromagnetic wave irradiation, infrared ray irradiation, and ultraviolet ray irradiation. Further, the continuous processing apparatus provided with the double speed conveyor according to the present invention is not limited to the above industrial fields, and is intended for processing such as drying, humidity control, deaeration, heating, cooking and sterilization in foods, pharmaceuticals and the like. It can also be used in continuous processing equipment.

[0025]

EFFECTS OF THE INVENTION According to the double speed conveyor of the present invention or the continuous processing apparatus equipped with the conveyor, when the conveyors are transferred, the objects to be conveyed are clogged at the end of the conveyor,
The transport speed does not decrease and smooth transport is possible.

[Brief description of drawings]

FIG. 1 is a side view showing a double speed conveyor according to the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is an enlarged cross-sectional view of a main part of FIG.

FIG. 4 is a longitudinal sectional view showing a continuous processing apparatus equipped with a double speed conveyor according to the present invention.

FIG. 5 is a side view showing a conventional double speed conveyor.

6 is an enlarged view of a main part of FIG.

[Explanation of symbols]

 (1) Endless chain (2) Inner link plate (3) Outer link plate (4) Pin (6) Large diameter roller (7) Small diameter roller (8) Guide rail (9) Drive sprocket (13) Guide rail horizontal part ( 14) Curved guide rail (21) 1st conveyor (22) 2nd conveyor (23) 3rd conveyor (24) 4th conveyor

Claims (3)

[Claims] 1. A guide rail (8), inner and outer link plates (2) and (3), a pin (4) for connecting them, and respective connecting pins (4)
A large diameter roller (6) for conveyance on which the object to be conveyed (A) is placed, and a small diameter roller (7) arranged concentrically with the large diameter roller (6) and rolling on the guide rail (8). And an endless chain (1) in which both rollers (6) and (7) rotate together when the weight of the object to be conveyed (A) is applied to the large diameter roller (6). In a double speed conveyor with a drive sprocket (9) for driving an endless chain (1),
The guide rail (8) has a horizontal part (13) parallel to the transport path,
A double speed conveyor comprising a curved portion (14) for winding a chain extending downward from both ends of the horizontal portion (13), and a drive sprocket (9) being arranged below the guide rail (8). 2. A processing area in which a plurality of the double speed conveyors of claim 1 are spaced apart and are defined to include at least one of the conveyor surfaces and at least a transport surface and a small space above it. Continuous processing device provided with. 3. The continuous processing apparatus according to claim 2, wherein the processing area is any one of heat treatment, baking, washing, painting, drying, curing, electromagnetic wave irradiation, infrared ray irradiation, ultraviolet ray irradiation, and deaeration. Continuous processing equipment including processing areas.