JP2006044372A - Floor conveyer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor conveyor allowing improving of durability and sound saving of a friction driving means in a carrying line and realizing of a carrying with a track surface set to a further low position. <P>SOLUTION: This floor conveyor 100 is provided with many carrier main bodies 130 for carrying a carrying body W by traveling on guide rail 110 and supporting rail 120 along the carrying line, and many friction driving means 150 for adding carrying force to the carrier main body 130 by sliding a driven bar 140 for carrying for connecting the carrier main bodies 130 one another. An arm supporting shaft 154 for horizontally oscillatably journaling an oscillating arm 153 for pressure regulation of a roller of the friction driving means 150 is erected at a friction roller side proximity position of the guide rail 110 and on a conveyor frame 170 at the same low position as that of the guide rail 110. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is a floor conveyor that transports a transporter carrying a transported object on the floor surface, and in particular, transports a transported object such as an automobile part on an automobile manufacturing line, welding process, assembly process, etc. It is related with the floor conveyor for conveying to the various processes of.

  In general, as a so-called floor transport system in which a transport body carrying a transported object such as an automobile part is transported on a floor surface, the transport body is transported by circulatingly driving a transport chain in which a large number of transport carriers are connected. Floor conveyors, floor self-propelled transport vehicles that run on the work floor from the power feeding drive means, etc., and in recent years, floor conveyors that can continuously transport a large number of objects such as automobile parts Is frequently used.

Therefore, as a conventional floor conveyor 500, as shown in FIG. 5, a guide rail 510 laid along the conveyance line, a support rail 520 provided immediately above the guide rail 510, and a rail on the support rail 520 are provided. A free roller 531 that rolls in the longitudinal direction is attached to a large number of inverted J-shaped carriers 530 that are axially attached to the upper end, and both sides of the guide rail 510 and is attached to the lower end of the inverted J-shaped carrier 530. A pair of lower guide rollers 532 and 532 and the base of the inverted J-shaped carrier 530 are connected to each other, and a transport driven bar 540 arranged between the guide rail 510 and the support rail 520, and a transport driven bar A plurality of friction drive means 550 disposed in the conveyance line while sandwiching both side surfaces of 540 and sliding in the conveyance direction; There is had example (see Patent Document 1).
Japanese Patent Laying-Open No. 2001-88693 (first page, FIG. 4)

However, the conventional floor conveyor 500 as described above has the following problems.
That is, the conventional floor conveyor 500, as shown in FIG.
Since the arm support shaft 554 for mounting the roller pressure swinging arm 553 of the friction drive means 550 so as to be horizontally swingable is disposed immediately below the guide rail 510, the size of the engagement with the guide rail 510 can be reduced. There is a problem on the installation layout that the conveyor track surface becomes waist high by the installation space of the arm support shaft 554 and the transport work space above the track is significantly restricted, and the arm support shaft 554 has to be considered. When a simple support shaft structure is employed, there is a problem that the function of the bearing function is lowered and the strength is lowered.

  Further, the conventional floor conveyor 500 is configured such that the friction roller 551 swings around the arm support shaft 554 disposed directly below the guide rail 510 and slides on the transport driven bar 540. The inertia that becomes the inertial force in the swinging direction toward the conveyance driven bar 540 is increased, and an impact is generated when contacting the conveyance driven bar 540, and noise such as an impact sound is generated, or the friction driving unit 550 is damaged. There was a problem that contributed.

  Therefore, the object of the present invention is to solve the problems of the prior art as described above, improve the durability and sound saving of the friction drive means in the transport line, and transport the track surface at a lower position. It is to provide a floor conveyor that can realize the above.

  First, the invention according to claim 1 includes a guide rail laid along a transport line, a support rail provided directly above the guide rail, and a track running along the guide rail and the support rail. A plurality of carrier bodies for conveying the carrier in the space above the floor of the conveyance line, and a driven follower bar arranged between the guide rail and the support rail and interconnecting the intermediate portions of the carrier bodies. In addition, a friction roller that slides on one side surface of the conveyance driven bar to apply conveyance force, a free roller that is held in contact with the other side surface of the conveyance driven bar, and a conveyance roller and the opposite position between the conveyance driven bar In the floor conveyor provided with a number of friction drive means having a friction roller and a roller pressure swinging arm that pivotally supports the free roller. The arm support shaft that pivotally mounts the swing arm for pressure regulation in a horizontally swingable manner is erected on the conveyor frame at the position adjacent to the friction roller side of the guide rail and at the same low position as the guide rail. The problem is solved.

  The floor conveyor of the present invention thus obtained includes a single guide rail laid along the transport line, a support rail provided immediately above the guide rail, and the guide rail and the support rail. A plurality of carrier bodies that run on the track and transport the carrier in the floor space of the transportation line, and a driven follower bar that is arranged between the guide rail and the support rail and connects the intermediate portions of the carrier bodies to each other. A friction roller that slides on one side of the transport driven bar to apply transport force, and a free roller that abuts and guides the other side of the transport driven bar and sandwiches the transport driven bar A plurality of friction drive means having a roller pressure swinging arm that pivotally supports the friction roller and the free roller at opposite positions, respectively. , It is possible to realize a reliable transport without rolling and rattling even weight conveyed, because it has a unique conveyor structure, it is possible to achieve the following effects.

  In other words, the arm support shaft that pivotally mounts the roller pressure swinging arm is erected on the conveyor frame at a position close to the friction roller side of the guide rail, thereby reducing the distance between the arm support shaft and the friction roller. Inertia, which is an inertial force in the swinging direction toward the transfer driven bar, is suppressed, eliminating noise such as impact noise that tends to occur when contacting the transfer driven bar and damage factors related to the friction drive means. As a result, the durability and sound saving of the friction drive means in the transport line can be improved.

  Further, since the arm support shaft is erected on the conveyor base at the same low position as the guide rail, the arm support shaft is arranged on the conveyor base without considering the size of the guide rail and the track. Since the surface can be set to a lower position, it is possible to realize excellent work operability with sufficient work work space above the track, and a sufficient support shaft structure can be adopted as an arm support shaft. The bearing function and bearing strength can be demonstrated.

  The present invention relates to a guide rail laid along a transfer line, a support rail provided directly above the guide rail, and a track on the floor of the transfer line by running along the guide rail and the support rail. A plurality of carrier main bodies for conveying the conveyance body, and a conveyance driven bar arranged between the guide rail and the support rail and interconnecting the intermediate portions of the carrier main body with each other. A friction roller that slides on one side of the roller and applies a conveying force, a free roller that is held in contact with the other side of the driven follower bar, and a friction roller and a free roller at opposite positions sandwiching the driven follower bar In a floor conveyor provided with a number of friction drive means each having a roller pressure swing arm that pivotally supports the roller pressure swing arm. The arm support shaft, which is pivotably mounted horizontally, is erected on the conveyor frame at a position close to the friction roller side of the guide rail and at the same low position as the guide rail. If it improves durability and sound saving, and realizes transport with the track surface set to a lower position, its concrete construction form, concrete transport body supported by the transport body support shaft Any specific rail material may be used for the guide rail and the support rail.

  In addition, about the construction form of the floor conveyor of the present invention, in consideration of the maintenance and the maintenance of the conveyor, it is common to construct the floor conveyor in a form that exposes the entire conveyor, but the transportation work area along the transportation line In consideration of the above work environment, it is possible to adopt a double floor structure and to perform construction in a form in which only the upper part of the carrier support shaft is exposed from the upper floor surface.

  The transporting body supported by the transporting body receiving shaft may be in any mounting form as long as it can transport the transported object, depending on the shape and structure of the transported object, Loading forms such as a plate, a conveyance frame, a conveyance basket, and a conveyance tray can be appropriately employed.

  The support rail may have any rail form such as a solid circular cross section, a hollow circular cross section, a solid square cross section, and a hollow square cross section as long as the rail form allows the transporter to run on a track. Needless to say, such a rail configuration can achieve an optimal layout along the transport line.

  The guide rail only needs to have at least a rail vertical surface portion and a rail horizontal surface portion laid along the transfer line, for example, an inverted T-shaped rail cross-sectional shape, an L-shaped rail cross-sectional shape, and an I-shaped shape. Any rail form such as a rail cross-sectional shape may be used.

  A specific sandwiching form between the transporting driven bar and the friction driving means is a sandwiching form in which the transporting driven bar can be reliably slid in the transporting direction. However, in consideration of the form of connection with the adjacent transfer follower bar, power transmission efficiency, etc., both sides of the transfer follower bar and the friction may be used. More preferably, the sliding surface of the driving means is a flat surface.

  Further, the arrangement layout of the friction drive means employed in the present invention does not need to be arranged in a one-to-one correspondence with each of the follower bars for conveyance in order to simplify the apparatus configuration. It is preferable to arrange them at positions where large conveyance power is particularly required such as areas, curved corners, and carry-out areas.

  The floor conveyor which is one Example of this invention is for conveying on the floor in a motor vehicle production line, in order to move conveyed goods, such as a motor vehicle part, to an assembly process, and demonstrates below based on drawing.

  Here, FIG. 1 is an overall schematic diagram showing the floor conveyor of the present embodiment, FIG. 2 is a perspective view showing a transport state of the carrier body, and FIG. 3 is an arrangement of the carrier body and the friction driving means. FIG. 4 is an enlarged plan view of the friction drive means.

  First, as shown in FIGS. 1 and 2, the floor conveyor 100 according to the present embodiment is a true guide rail 110 having a reverse T-shaped rail cross section laid along an automobile manufacturing line as a transfer line. A support rail 120 having a solid circular cross section is provided in parallel on the conveyor track to form a conveyor track, and a conveyed product is transported in the space above the floor of the automobile production line that runs along the guide rail 110 and the support rail 120. A large number of carrier bodies 130 that transport the transported carrier W, a transport driven bar 140 that is arranged between the guide rail 110 and the support rail 120 and connects the intermediate portions of the carrier body 130 to each other; A number of frictions are arranged along the production line to slide the side surfaces of the transport driven bar 140 and apply transport force to the carrier body 130. And a driving means 150.

  The guide rail 110 has an inverted T-shaped rail cross-sectional shape including a rail vertical surface portion 111 and a rail horizontal surface portion 112 laid along the automobile manufacturing line, and the carrier body 130 has the rail vertical surface portion 111. Therefore, it is possible to smoothly carry and transport the vehicle without requiring a strict fitting dimension.

  Further, the lower surface portion of the support rail 120 is supported by a number of fixed legs 160 fixed at predetermined intervals along the floor surface of the automobile production line. The support rail 120 is composed of a curved C-shaped plate that bulges to the side of the automobile production line so that the support rail 120 can move in the rail longitudinal direction, and the above-described guide rail 110 has an inverted T-shape. The rail unit is configured by being integrally assembled to the rail horizontal plane portion 112 having a rail cross-sectional shape by welding or the like.

  As shown in FIG. 2, the carrier body 130 is rotatably mounted on the swing frame 131 on the upper part of the carrier and rolls over the support rail 120 while making linear contact with the rail in the longitudinal direction. A pair of front and rear free rollers 132 and 132, and a pair of four upper guide rollers 133 in total, each pair of front and rear left and right, which are rotatably mounted on the carrier and roll in the longitudinal direction of the rail while sandwiching both sides of the support rail 120. 133, 133, 133, and the front, rear, left and right sides of the carrier body 130, which are rotatably attached to the lower part of the carrier and hold the both sides of the guide rail 110 while maintaining the upright posture of the carrier body 130. A pair of four lower guide rollers 134, 134, 134, 134 and a carrier in the vicinity of and directly above the free rollers 132, 132 It is provided with a carrier receiving shaft 135 that is provided at the top and pivotally supports the bottom of the carrier W so that it can be smoothly conveyed even in an automobile production line called vertical bend such as front up and down. It has become.

  The floor conveyor 100 installed in the automobile production line as in this embodiment is generally constructed in a form in which the entire conveyor is exposed on the floor surface in consideration of the maintenance of the conveyor. Considering the work environment of the transfer work area along the line, it is also possible to adopt a double floor structure and to perform construction with only the upper part of the transfer body receiving shaft 135 exposed from the upper floor surface.

  Further, the transport driven bar 140 is horizontally mounted between the guide rail 110 and the support rail 120 and is adjacent to the transport driven bar 140 adjacent to the connecting shaft 136 that is present in the middle portion of the carrier body 130. The two ends supported to form a chord with respect to the arc locus at the curved corner of the automobile production line, even though the transport driven bar 140 is formed of a linear member. The conveyance direction is changed while smoothly following the state.

Next, the friction drive means 150, which is the most characteristic of the floor conveyor 100 of the present embodiment, will be described in more detail with reference to FIGS.
The friction driving means 150 is slid on one side surface of the transport driven bar 140 to apply a transport force, and the passive roller 152 is in contact with the other side surface of the transport driven bar 140 so as to be held and guided. And a roller pressure swinging arm 153 that pivotally supports the friction roller 151 and the passive roller 152 at opposite positions sandwiching the conveyance follower bar 140, and spaced apart at predetermined intervals along the automobile production line. The friction roller 151 and the passive roller 152 are configured to slide with the conveyance driven bar 140 interposed therebetween.

  An arm support shaft 154 that pivotally mounts the roller pressure swinging arm 153 is erected on the conveyor base 170 at a position close to the friction roller side of the guide rail 110, so that the arm support shaft 154, the friction roller 151, Is shorter than that of the conventional automobile production line floor conveyor 500, and inertia F, which is an inertial force in the swinging direction toward the driven follower bar 140, is suppressed. It is possible to improve the durability and sound saving of the friction drive means 150 by eliminating noises such as impact sounds that tend to occur and damage factors relating to the friction drive means 150.

  In addition, since the arm support shaft 154 is erected on the conveyor base 170 at the same low position as the guide rail 110, the mating size with the guide rail 110 such as the floor conveyor 500 for a conventional automobile production line is taken into consideration. Therefore, the arm support shaft 154 can be arranged on the conveyor base 170 so that the track surface can be set to a lower position. Therefore, it is possible to realize transport with excellent work operability with sufficient transport work space above the track. Moreover, a sufficient support shaft structure can be adopted as the arm support shaft 154, and an excellent bearing function and bearing strength can be exhibited.

3 to 4, reference numeral 155 is a support bracket that rotatably supports the friction roller 151, and reference numeral 156 is a drive motor that is provided on the support bracket 155 and drives the friction roller 151. Reference numeral 157 is a swing lever that rotatably supports the passive roller 152, and reference numeral 158 is a support lever that supports the swing lever 157 so as to be horizontally swingable.
Also, reference numeral 159 in FIG. 4 is an urging spring stretched between the swing lever 157 and the support lever 158, and the contact force of the friction roller 151 is reduced by the spring force of the urging spring 159. By adjusting, the friction of the friction roller 151 is reduced, and the conveying force is added at an optimum power transmission rate.

  Further, the friction driving means 150 described above includes a pair of damper mechanisms 180 and 180 formed of a centering spring stretched between the roller pressure swinging arm 153 and the conveyor base 170.

  As described above, in the floor conveyor 100 according to the present embodiment, the arm support shaft of the friction driving unit 150 that applies the conveyance force to the conveyance follower bar 140 is positioned near the friction roller side of the guide rail 110, and By standing on the conveyor base 170 at the same low position as the guide rail 110, the durability and sound saving of the friction drive means 150 are improved, and conveyance with the track surface set to a lower position is realized. The effect is enormous.

BRIEF DESCRIPTION OF THE DRAWINGS The whole schematic diagram of the floor conveyor which is one Example of this invention. The perspective view which shows the conveyance state of a carrier main body. Explanatory drawing of the arrangement | positioning relationship between a carrier main body and a friction drive means. The top view which expanded the friction drive means. Explanatory drawing of the arrangement | positioning relationship between the conventional carrier main body and friction drive means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100,500 ... Floor conveyor 110,510 ... Guide rail 111 ... Rail vertical surface part of reverse T-shaped cross section 112 ... Rail horizontal plane part of reverse T-shaped cross section 120,520 · Support rail 130 ··· Carrier body 530 ··· Reverse J-shaped carrier 131 ··· Swing frame 132 ··· Free roller 133 · · · Upper guide roller 134 · · · Lower guide roller 135 ··· Conveyance Body bearing shaft 136 ... Connection shaft 140, 540 ... Conveyance driven bar 150, 550 ... Friction drive means 151, 551 ... Friction rollers 152, 552 ... Passive rollers 153, 553 ... Roller pressure swing arm 154, 554 ... Arm support shaft 155 ... Support bracket G 156 ・ ・ ・ Drive motor 157 ・ ・ ・ Swing lever 158 ・ ・ ・ Support lever 159 ・ ・ ・ Biasing spring 160 ・ ・ ・ Fixed leg 170 ・ ・ ・ Frame mount 180 ・ ・ ・ Damper composed of pressure adjusting spring Mechanism W ... Transport body F ... Inertia

Claims (1)

A single guide rail laid along the transport line, a support rail provided directly above the guide rail, and a track traveling along the guide rail and the support rail to move the transport body in the space above the floor of the transport line A plurality of carrier bodies to be transported and a transport driven bar that is arranged between the guide rail and the support rail and interconnects the intermediate portions of the carrier body, and is provided on one side of the transport driven bar. The friction roller and the free roller are axially supported at opposite positions sandwiching the friction roller that slides and applies the conveying force, the free roller that is in contact with the other side of the conveying driven bar and sandwiched and guided. In a floor conveyor provided with a number of friction drive means having a roller pressure swinging arm,
The arm support shaft that pivotally mounts the roller pressure swinging arm in a horizontally swingable manner is erected on the conveyor frame at a position close to the friction roller side of the guide rail and at the same low position as the guide rail. A featured floor conveyor.

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