JPH0971272A - Oven conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the oven conveyor which is less covered with dust while works are being carried, facilitates cleaning the floor surface of an oven, make the conveyor low in height, and make its carrier small in size and light in weight, and thereby enhance the heat efficiency of the oven. SOLUTION: A carrier 4 in a pallet shape on which a work W is rested, is supported between the bearing members 15 and 15 of a preceding trolley 3 in the carrying direction and an afterward trolley 3 out of plural trolleys 3 to be mounted to a conveyor chain 2. By this constitution, the cylindrical dog member 13 is engaged with a round hole groove 16 formed at the bottom surface at the front part of the carrier 4 so that it tracks the carrier 4, and the cylindrical dog member 13 is engaged with a slot groove 18 formed at the bottom surface at the rear part of the carrier 4 so that it guides the carrier 4 in such a way that the carrier is oriented to the advancing direction of the conveyor chain 2. When the conveyor chain is moved at a curved route, the carrier 4 can thereby be smoothly carried along the route by letting the cylindrical dog 13 of the afterward trolley 3 be moved back and forth within the slot groove 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oven conveyor for carrying a work in an oven (drying oven) used in a painting process of an automobile factory.

[0002]

2. Description of the Related Art In a painting process of an automobile factory, a conventional oven conveyor used in an oven is installed on two traveling rails 20 laid in parallel on the floor as shown in FIG. A transport carriage 22 for transporting the work W is provided by the transporting vehicle wheels 21, and the pusher dog 26 and the retainer dog 27 of the trolley 25 mounted on the conveyor chain 24 are mounted on the center roller 23 provided on the transport carriage 22. Engage and
It is configured to pull the transport carriage 22.

[0003]

In the conventional oven conveyor having the above-mentioned structure, there is a problem that wear metal powder generated when the carrier wheels travel on the traveling rail becomes a dust source.
Further, since the traveling rails are laid on both sides in the traveling direction of the transport carriage, the width of the conveyor becomes wide, and the traveling rails obstruct the cleaning work of the floor, resulting in poor workability.

Therefore, in order to convey the work in the oven, there may be considered a method of conveying the work by a floor type double conveyor without using the above-mentioned conveyor using the carriage.

The floor-type compound conveyor is mounted on an upper portion of a trolley where a carrier carrying a work is guided by a guide rail so as to travel freely, and on a lower portion of the trolley,
Another guide rail is arranged in parallel with the guide rail, and the trolley directly connected to the chain is supported by the guide rail to run. The trolley connected to the chain and the trolley to which the carrier is attached are configured so that they can be engaged and disengaged as needed.

Unlike the oven conveyor described above, the floor type double conveyor having the above-described structure does not require the carrier wheels to be supported on the traveling rails by the wheels of the carrier wheels, and therefore dust generated during transportation is generated. And the workability of floor cleaning work is excellent. However, in the floor type double trolley conveyor, since the guide rails that guide the trolley that guides the conveyor chain and the guide rails that guide the trolley to which the carrier is attached are arranged in two stages, upper and lower, The overall height is high, and as a result, the conveyor having such a structure has a problem that it cannot be installed unless the oven has a large cross-sectional area.

Therefore, the present invention solves the above-mentioned problems of the prior art, generates less dust during the work transfer, facilitates the cleaning work of the oven floor surface, and lowers the conveyor height. Moreover, it is an object of the present invention to provide an oven conveyor capable of reducing the size and weight of a carrier and improving the thermal efficiency of the oven.

[0008]

In order to achieve the above object, an oven conveyor of the present invention is provided with a plurality of trolleys mounted on a conveyor chain and traveling on a floor surface guided by guide rails. A receiving member provided to support the bottom surface of the pallet-shaped carrier on which the work is placed, and provided to each of the trolleys,
A cylindrical dog member having a vertical axis that engages with a round hole groove or an elongated hole groove formed on the bottom surface of the carrier.

The round hole groove is formed in the front part of the bottom surface of the carrying device, and the long hole groove is formed in the rear part of the bottom surface of the carrying device so as to be long in the front-rear direction, and is a columnar shape of the trolley which precedes in the carrying direction. The dog member and the cylindrical dog member of the rear trolley are configured to be engaged with the round hole groove and the elongated hole groove of one carrier, respectively.

The receiving member is composed of a receiving roller rotatably supported around a horizontal axis perpendicular to the conveying direction of the conveyor chain, and the cylindrical dog member is a dog roller rotatably supported around a vertical axis. It is preferable that Further, it is also preferable that the outer peripheral surface of the cylindrical dog member is formed into a moderately curved surface. Further, it is also preferable that the cylindrical dog members are arranged at equal intervals along the conveyor chain.

[0011]

The pallet-shaped carrier on which the work is placed is supported between the receiving members of the trolley which is attached to the conveyor chain and which is in front of and behind the trolley, and the columnar dog member of the preceding trolley. Engages in the round hole groove formed in the front part of the bottom surface of the carrier and pulls the carrier, and the cylindrical dog member of the rear trolley engages in the long hole groove formed in the rear part of the bottom surface of the carrier. Guide the carrier so that it faces the direction of travel of the conveyor chain. When the conveyor chain moves on a curved path, the cylindrical dog of the rear trolley moves back and forth in the slotted groove, so that the carrier is smoothly transported along the path.

Further, when the receiving member and the cylindrical dog member are each constituted by a rotatable receiving roller and dog roller, these rollers rotate when the carrier is conveyed along a curved path. As a result, the direction of the carrier can be changed more smoothly. Further, when the outer peripheral surface of the cylindrical dog member is formed into a curved surface having a medium height,
When the carrier is conveyed on an inclined path, the carrier smoothly tilts around the cylindrical dog member that engages with the round hole groove on the front of the carrier as a fulcrum, and engages with the rear long hole groove. It is possible to absorb the difference in height with the cylindrical dog that is present.

Further, when the cylindrical dog members are arranged at equal intervals along the conveyor chain, the round hole groove of the carrier is engaged with the cylindrical dog of any trolley provided on the conveyor chain. However, the cylindrical dog member of the subsequent trolley can be engaged with the slotted hole at the rear of the carrier.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a state in which the body of a vehicle is being conveyed as a work W in the oven by the oven conveyor 1 of the present invention. As shown in the figure, an oven conveyor 1 is installed on the floor of the oven, is equipped with a conveyor chain 2, and is adjacent to the trolley 3 directly attached to the conveyor chain 2 at regular intervals. The combined two support the front and rear of the carrier 4 on which the work W is mounted.

FIG. 2 is a cross-sectional view showing the detailed structure of the oven conveyor 1 as seen in the direction of the arrow from line AA in FIG. 1, and FIG. 3 is in the direction of the line BB in FIG. It is the partial sectional view seen. As shown in FIG. 2, on the floor surface, U-shaped conveyor frames 5 whose upper portions are opened along the conveyance direction of the oven conveyor 1 are installed at regular intervals. A pair of U-shaped guide rails 6 extending in the direction are fixed so as to face each other. The conveyor chain 2 is surrounded by covers 7 from both sides.

On the pair of guide rails 6 and 6, horizontal guide rollers 9 and 9 rotatably supported by horizontal shafts 8 and 8 provided on both front and rear sides of the trolley 3 are movably guided. ing. Further, vertical guide rollers 11, 11 rotatably supported by vertical shafts 10, 10 provided in front of and behind the trolley 3 between the upper end surfaces 6A, 6A of the pair of guide rails 6, 6 which face each other. Are each guided.

The lower part of the trolley 3 is fixed to the conveyor chain 2, and the column 12 is provided on the upper part so as to project upward. A dog roller 13 as a cylindrical dog is attached to the top of the column 12 so as to be rotatable around a vertical axis. Further, a pair of horizontal arms 14 and 14 are provided so as to project from the lower portion of the dog roller 13 of the support column 12 to the left and right sides, and the receiving rollers 15 and 15 as receiving members are provided at the tips of the horizontal arms 14 and 14, respectively. Is rotatably mounted around a horizontal axis.

The dog roller 13 is engaged with a circular hole groove 16 formed in the bottom surface of the carrier 4 placed on the trolley 3 at the front center position in the transport direction, and transmits the pulling force of the conveyor chain 2 to the carrier 4. It is supposed to do. Further, the receiving rollers 15 and 15 contact the bottom surface of the carrying device 4 to support the weight thereof.

As shown in FIG. 4, the round hole groove 16 is engaged with the dog roller 13 of the trolley 3 which supports the front portion of the carrying device 4, and the front end of the round hole groove 16 has a carrying device. If the front of 4 floats up during transportation, the dog roller 1
In order to make it difficult to disengage from the engagement with 3, the hook portion 17 protruding downward from the bottom surface of the carrier 4 is formed.

Further, on the bottom surface of the carrier 4 at the rear center position,
In order to guide the rear part of the carrier 4, a slotted hole 18 which is long in the transport direction and which engages with the dog roller 13 of the trolley 3 which supports the rear part of the carrier 4 is formed. Further, in this embodiment, the dog roller 13 is formed in a middle-height shape whose outer peripheral surface is curved, and when the carrier 4 passes through the inclined path,
As a fulcrum of the dog-roller 13 having the middle height, which is engaged with the round hole groove 16 in the front portion of the carry device 4, the carry device 4 tilts smoothly and has a height difference from the dog roller 13 engaged with the rear long-hole groove. Is able to absorb.

In the oven conveyor 1 of the present invention constructed as described above, the dog roller 13 of the trolley 3 preceding the round hole groove 16 in the front part of the carrier 4 on which the work W is mounted.
In addition, the rear long slot 18 is engaged with the dog roller 13 of the rear trolley 3 from above so that each trolley 3
It is supported on the receiving roller 15 of.

In the present embodiment, the dog rollers 13 provided in each trolley 3 are arranged at equal intervals along the conveyor chain, and the round hole grooves 16 formed in the front and rear of the bottom surface of the carrier 4 are provided. It can be engaged with any groove of the hole groove 18. Therefore, when the conveyance pitch of the carrier 4 in the normal state is P and the interval between the dog rollers 13 is L,
If P = nL (where n is an integer greater than or equal to 2) and n-2 empty trolleys 3 are arranged between the front and rear carriers 4, 4 supporting the carrier 4, Even if there is a transfer delay of the work W at the transfer section, it is possible to transfer to the trolley 3 with a waiting time of only 1 / n of the maximum normal tact, and the influence of the transfer delay on the line can be minimized. it can.

Then, by driving the conveyor chain 2 to run, the carrier 4 is pulled by the dog roller 13 of the preceding trolley 3 while being supported by the receiving rollers 15 of the front and rear trolleys 3 and conveyed. To be done. At this time, the dog roller 13 of the rear trolley 3 engaged with the elongated hole groove 18 of the carrier 4 has a function of guiding the carrier 4, and the dog roller 13 of the rear trolley 3 moves forward and backward in the elongated hole groove 18. Therefore, it is possible to cope with an error in the distance between the dog rollers 13 of the front and rear trolleys 3 and a change in the distance between the front and rear dog rollers 13 when moving along the curved path.

FIG. 5 shows a state in which the carrier 4 is conveyed along a curved path in a horizontal plane. As shown in FIG. 5, when the carrier 4 is conveyed along the curved path A, The distance between the dog rollers 13 before and after moving along the traveling line of the conveyor chain 2 is shorter than that of the portion of the straight path B, and the difference is that the dog roller 13 moves in the slot 18 at the rear of the carrier 4. Is absorbed by doing.

Further, when the receiving roller 15 supporting the bottom surface of the carrying device 4 approaches the curved path A, the receiving roller 15 changes its orientation in a horizontal plane with respect to the bottom surface of the carrying device 4, but at that time, the receiving roller 15 is carried by the carrying device. By rotating with respect to the bottom surface of the carrier 4, it is possible to smoothly follow the change in the direction of the carrier 4.

Although the dog roller 13 is used as the cylindrical dog and the receiving roller 15 is used as the receiving member in the above-described embodiment, the cylindrical dog, the surface of the receiving member, and the round hole of the carrier 4. When the inner surface and the bottom surface of the groove or the slotted groove have large slipperiness, the cylindrical dog and the receiving member do not necessarily need to have a rotatable roller structure, and can be configured by a fixed member.

[0027]

As described above, according to the oven conveyor of the present invention, since the pallet type carrier without the carrier wheels is used as the carrier for transferring the work, the carrier on the conventional traveling rail is used. Compared to a conveyor having a structure in which wheels run, dust generation during transportation can be reduced, and cleaning of the floor in the oven becomes easy.

Further, as in the conventional floor type double conveyor, it is necessary to arrange the guide rails for guiding the trolley with the carrier and the guide rails for guiding the trolley with the conveyor chain arranged in two stages, upper and lower. Since it does not exist, the height of the conveyor can be reduced and it can be used in an oven having a small cross section.

Further, since the carrier can be easily attached to and detached from the trolley, the processed work is unloaded from the carrier coming out of the outlet of the oven, and the unprocessed work is mounted and immediately put into the oven from the inlet. Since the structure of the carrier that can be carried in and used to place the work can be simple and compact and lightweight, the amount of heat in the oven carried out by the carrier can be reduced. You can

Further, when the receiving member and the cylindrical dog member are constituted by a rotatable receiving roller and dog roller, respectively, these rollers rotate when the carrier is conveyed along a curved path. As a result, the direction of the carrier can be smoothly changed.

Further, when the outer peripheral surface of the cylindrical dog member is formed into a curved surface having a medium height, it is engaged with the round hole groove at the front part of the carrying device when the carrying device is carried on the inclined path. Since the carrier can be tilted smoothly with the cylindrical dog member that is being supported as the fulcrum, the height difference between the carrier and the cylindrical dog that is engaged with the slot in the rear can be absorbed, and the carrier can be smoothly moved. Can be transported.

Further, when the cylindrical dog members are arranged at equal intervals along the conveyor chain, the circular hole groove of the carrier is engaged with the cylindrical dog of any trolley provided on the conveyor chain. However, since the elongated dog groove of the rear part of the carrying device can be engaged with the cylindrical dog member of the following trolley, even if there is a transfer delay of the carrying device at the entrance connecting part of the oven conveyor, it moves to the next. Immediate transfer to the trolley allows minimal impact on the line.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of an oven conveyor of the present invention.

2 is a cross-sectional view of the oven conveyor taken along the line AA in FIG.

3 is a partial cross-sectional view of the oven conveyor taken along the line BB in FIG.

FIG. 4 is a view showing a supporting state of a carrier of an oven conveyor of the present invention.

FIG. 5 is a diagram showing a state in which a carrier travels along a curved path in the oven conveyor of the present invention.

FIG. 6 is a side view showing an example of a conventional oven conveyor.

[Explanation of symbols]

 1 Oven Conveyor 2 Conveyor Chain 3 Trolley 4 Carrier 6 Guide Rail 13 Dog Roller (Cylindrical Dog Member) 15 Receiving Roller (Receiving Member) 16 Round Hole Groove 18 Long Hole Groove

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshihisa Sakamoto 4-17-96 Tsurumi, Tsurumi-ku, Osaka City, Osaka Prefecture Tsubakimoto Chain Co., Ltd.

Claims (4)

[Claims] 1. A plurality of trolleys mounted on a conveyor chain and guided by guide rails to travel on a floor surface, and supporting a bottom surface of a pallet-shaped carrier provided on each trolley and on which a work is placed. A receiving member and a cylindrical dog member provided on each of the trolleys and having a vertical axis that engages with a round hole groove or an elongated hole groove formed on the bottom surface of the carry device, wherein the round hole groove is a carry device. The slotted groove is formed at the front part of the bottom surface, and is formed at the rear part of the bottom surface of the transporter so as to be long in the front-back direction. An oven conveyor characterized in that the member and the member are configured to be engaged with the round hole groove and the long hole groove of one carrier, respectively. 2. The receiving member is composed of a receiving roller rotatably supported around a horizontal axis perpendicular to the conveying direction of the conveyor chain, and the cylindrical dog member is rotatably supported around a vertical axis. The oven conveyor according to claim 1, wherein the oven conveyor comprises a dog roller. 3. The outer peripheral surface of the cylindrical dog member is formed into a medium curved surface.
The oven conveyor described. 4. The oven conveyor according to claim 1, wherein the cylindrical dog members are arranged at equal intervals along the conveyor chain.