KR102213271B1 - Pallet conveyor system with reverse type timing belt - Google Patents

Abstract

The present invention relates to a pallet transfer conveyor system using a reverse type timing belt, capable of accurately locating a pallet for the assembly and inspection of a product on a process position for each stage, and simply building a pallet supply line even including a pallet collection line in a minimum installation space with free length expansion. The pallet transfer conveyor system includes: a transfer module which can be used solely or used through the connection of at least two pieces by including a base frame, a guide rail installed in a longitudinal direction of the base frame, a timing belt installed side by side near the guide rail in the base frame to circulate along a track, and a driving motor providing a driving force such that the timing belt can be circulated; and a transfer jig docked to the guide rail to be slidable to transfer a pallet while moving along the guide rail. Since the timing belt is provided as a reverse type timing belt having sawteeth flipped towards the outside of the track instead of the inside, when the transfer jig is docked to the guide rail, the timing belt comes into a state wherein the belt can draw the transfer jig while being geared to the transfer jig.

Description

Pallet conveyor system with reverse type timing belt

The present invention relates to a conveyor system for conveying pallets, and in particular, it is possible to accurately position pallets at each step process position for assembly and inspection of products produced, and a line for supplying pallets within a minimum installation space with free length extension It relates to a conveyor system for pallet transfer that enables simple construction of a line to collect pallets together with.

In general, a pallet for transport is also called a conveyor board or board for short. As it flows along the conveyor, products are placed on it, and the assembly or inspection of these products is sequentially followed by step-by-step process lines installed along the conveyor. While the work is done.

In order to transport such pallets, a horizontal belt conveyor equipped with a horizontal belt with a wide left and right width is used as it is. However, in the case of such a horizontal belt conveyor, it is difficult to control the position as a general-purpose conveyor for transporting various kinds of cargo, so it is difficult to stop the pallet at the correct position in the step-by-step process line.

In addition, there is a disadvantage that a separate transportation means is required to recover the pallet, it is difficult to apply in a clean environment, and the transfer speed is limited.

On the other hand, in the case of a roller conveyor, which is a method of transferring goods by rotating a plurality of rollers by a chain in order to transfer pallets, there is a disadvantage in that the noise is high and it is difficult to control the desired position. In addition, it is difficult to apply a clean environment and there is also a disadvantage that the transfer speed is slow.

Korean Registered Patent Publication No. 10-2108468 (2020.04.29.)

Accordingly, the present invention has been proposed to solve the problems of the related art as described above, and an object of the present invention is to accurately position the pallet at each step process position for assembly and inspection of the product, and the length extension is free and The goal is to provide a conveyor system for pallet transfer that enables simple construction of a line that supplies pallets and a line that collects pallets within the minimum installation space.

In order to achieve the above object, the pallet transport conveyor system according to the technical idea of the present invention is a pallet transport conveyor system that transports pallets for transporting products in order to proceed with the process of products, including a base frame, the base Including a guide rail installed long in the longitudinal direction of the frame, a timing belt installed side by side in the base frame and circulating along a track, and a drive motor providing driving force to circulate the timing belt, or two Transfer module that can be used by connecting the above; Includes; a transfer jig that is docked to the guide rail so as to be slidable to transfer the pallet while moving along the guide rail, wherein the timing belt is a reverse-type timing belt in the form of an inverted shape so that the teeth face the outside of the track rather than the inside of the track. When the transfer jig is docked on the guide rail, the transfer jig is engaged with the transfer jig and is in a state in which the transfer jig can be dragged and moved.

Here, the transfer jig includes a slide portion having a slide groove at a central portion of the lower surface thereof so as to be slidably docked to the guide rail, and a toothed portion formed on the lower surface of the feed jig with teeth engaged in correspondence with the teeth of the timing belt near the slide portion. It may be characterized by having a.

In addition, the guide rail is formed to have a wider upper portion than the lower portion, and the transfer jig has a slide groove formed to have a wider upper portion than the lower portion corresponding to the guide rail, so that the engaging portion is the timing belt It may be characterized in that it is possible to maintain the state of being engaged with.

In addition, the engagement portion of the transfer jig is provided on the left side and the right side of the slide unit, and one of them is engaged with the timing belt, so that the transfer module is disposed side by side in the opposite direction for supply and recovery. It can be characterized in that it can be engaged with the timing belt as it is without turning it in the opposite direction.

In addition, a plurality of positioning grooves are formed on the lower surface of the transfer jig, spaced in the front-rear direction, and a plurality of pallet positioning members are installed spaced apart in the front-rear direction of the base frame, and the pallet positioning member Consisting of a crystal member body fixed to the base frame and an elevator body installed to be elevated from the crystal member body, the upper end of the elevator body is inserted into any one of the positioning grooves of the transfer jig when the elevator body is raised. It may be characterized in that it is possible to set the exact position of the transfer jig and pallet.

In addition, a cut-off section in which the base frame and the guide rail are cut off is formed at the front end and the rear end of the transfer module, and a movable variable rail is provided to connect the disconnected guide rail by selectively entering the cut-off section of the guide rail. A member may be further included, and the transfer jig may be moved between the transfer module and the transfer module arranged in plurality by the switching member.

In addition, the transfer module is arranged side by side in opposite directions to the left side and the right side for supply and recovery, and one of the switching members is connected so that the transfer jig can move from the transfer module for supply to the transfer module for collection, and the The other switching member may be characterized in that the transfer jig is connected to move from the transfer module for recovery to the transfer module for supply.

In addition, the switching member includes a horizontal base in which one end and the other end are respectively retracted in a disconnected section of each transfer module arranged in the left and right sides, and is installed along the horizontal base and rotated by a motor driving force. And a moving body that is installed in a screwed state through which the screw passes through and moves along the screw by rotation of the screw, and a moving body that is installed on the upper surface of the moving body and moves with the moving body while disconnecting each transfer module. It may be characterized in that it includes a variable rail for selectively connecting the guide rail.

In addition, the transfer module is arranged side by side in opposite directions at the top and bottom for supply and recovery, and one of the conversion members is connected so that the transfer jig can move from the transfer module for supply to the transfer module for collection, and the The other switching member may be characterized in that the transfer jig is connected to move from the transfer module for recovery to the transfer module for supply.

In addition, the conversion member includes a vertical base in which an upper end and a lower end are respectively retracted in a disconnected section of each transfer module arranged in the upper and lower sides, and is installed along the vertical base to rotate by a motor driving force. A screw, a moving body that is installed in a screwed state through which the screw passes and moves along the screw by the rotation of the screw, and a guide rail that is disconnected from each transfer module while being installed on the upper surface of the moving body and moving with the moving body. It may be characterized in that it includes a variable rail for selectively connecting.

In addition, a positioning encoder that measures the circulation distance of the timing belt by the number of rotations of the rotor rotating in contact with the timing belt in the base frame and calculates the pallet transfer distance, and the timing belt It may be characterized in that the tooth type detection sensor is further installed to detect the teeth and calculate the conveyance distance of the pallet.

In addition, at least one of the pulleys installed at the front end and the rear end of the base frame is elastically supported by a pulley damper to reduce the impact generated when the transfer jig moves between transfer modules connected in a line. It can be characterized by being so.

The conveyor system for pallet transfer according to the present invention enables the pallet to be accurately positioned at each step of the process position for assembly and inspection of the product produced, and the length extension is free and the pallet is supplied along with the line that supplies the pallet within the minimum installation space. It is possible to easily build a line to recover.

1 is a use state diagram of a conveyor system for pallet transfer according to an embodiment of the present invention
2 is a plan view of a conveyor system for conveying pallets according to an embodiment of the present invention
3 is a side view of a conveyor system for conveying pallets according to an embodiment of the present invention
Figure 4 is a side view of a state in which the switching member is removed from Figure 5
Figure 5 is a reference side view showing the main configuration of the transfer module in the conveyor system for pallet transfer according to an embodiment of the present invention
6 is an enlarged view of'A' of FIG. 3
7 is a cross-sectional view taken along BB in FIG. 3
8 is a cross-sectional view taken along CC of FIG. 3
9 is a reference diagram showing the connection parts of serially connected transfer modules in the pallet transfer conveyor system according to an embodiment of the present invention
10 is a side view of a transfer jig on which a pallet is loaded in a conveyor system for pallet transfer according to an embodiment of the present invention
11 is a front view of a transfer jig on which a pallet is loaded in a conveyor system for pallet transfer according to an embodiment of the present invention
12 is a front view of a switching member in the conveyor system for pallet transfer according to an embodiment of the present invention
13 is a side view of a side view of a switching member in a conveyor system for conveying pallets according to an embodiment of the present invention
14 is a side view of a switching member in a state in which a transfer jig is docked in the conveyor system for pallet transfer according to an embodiment of the present invention

With reference to the accompanying drawings will be described in detail with respect to the conveyor system for conveying a pallet according to embodiments of the present invention. Since the present invention can apply various changes and have various forms, specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific form of disclosure, and it should be understood that all changes, equivalents, and substitutes included in the spirit and scope of the present invention are included. In describing each drawing, similar reference numerals have been used for similar elements. In the accompanying drawings, dimensions of structures are shown to be enlarged than actual for clarity of the present invention, or reduced than actual to understand a schematic configuration.

Further, terms such as first and second may be used to describe various components, but the components should not be limited by the terms. These terms are used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. Meanwhile, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

<Example>

1 is a state diagram of use of a conveyor system for pallet transfer according to an embodiment of the present invention, FIG. 2 is a plan view of a conveyor system for pallet transfer according to an embodiment of the present invention, and FIG. 3 is a pallet according to an embodiment of the present invention. It is a side view of the conveying conveyor system, and FIG. 4 is a side view of a state in which the switching member is removed from FIG. 5, and FIG. 5 is a reference side view for explaining the main configuration of a conveying module in the pallet conveying conveyor system according to an embodiment of the present invention. to be.

As shown, the pallet transfer conveyor system 100 according to the embodiment of the present invention includes a base frame 101, a guide rail 102, a timing belt 110, a transfer jig 120, and a drive motor 131 A driving unit 130, including a pallet positioning member 140, an encoder 150a for positioning, a waveform detection sensor 150b, a switching member 160, and a pulley damper 170.

In this embodiment of the present invention, based on the base frame 101, the guide rail 102, the timing belt 110, the driving unit 130, the pallet positioning member 140, the positioning encoder 150a, and A transfer module (100M), which has a waveform detection sensor (150b) and establishes an independent track of the timing belt (110), is connected as a basic unit, and the switching member (160) supplies the transfer module (100M) to It is used when connecting in the opposite direction by receiving it.

In the present invention, it should be noted that in the case of the timing belt 110, as shown in FIG. 5, the teeth 111 are provided with a reverse-type timing belt 110 that is inverted so that the teeth 111 face the outside rather than the inside of the track. have. In this way, when the reverse-type timing belt 110 is used, as well as position control, the transfer jig 120 is docked to the guide rail 102 and is directly engaged with the timing belt 110 so that the transfer jig 120 This makes it much easier to drag and move it. In addition, even if a plurality of transfer modules (100M) operating the tracks of the timing belts 110 that are independent from each other are connected in the same direction or are connected in opposite directions using the switching member 160, the timing belts 110 having independent tracks are As the linkage is made, it becomes easier to configure the transfer jig 120 to move continuously.

As a result, it is possible to accurately position the pallet (PL) at the process position for each step for assembly and inspection of the product produced, and the length can be extended freely and from the line supplying the pallet (PL) to the line that collects it within the minimum installation space. It simply becomes possible to build.

Hereinafter, a conveyor system for conveying a pallet according to an embodiment of the present invention will be described in detail with reference to each of the components.

The base frame 101 is the installation base of the guide rail 102, the timing belt 110, the driving unit 130, the pallet positioning member 140, the positioning encoder 150a and the waveform detection sensor 150b Becomes. The base frame 101 may be supported by a separate support or frame so that it can be positioned at an appropriate height according to each process line.

The guide rail 102 is installed long in the longitudinal direction on the upper surface of the base frame 101 and serves to stably guide the movement of the transfer jig 120. The guide rail 120 is formed to have a wider width than the lower portion corresponding to the slide groove 123a of the transfer jig 120 shown in FIG. 11 so that the transfer jig 120 is docked without being lifted even if a negative reaction force acts. To maintain a stable state. This is important not only for the stable movement of the transfer jig 120 but also for stably maintaining a state in which the transfer jig 120 is engaged with the timing belt 110.

The timing belt 110 is provided to circulate along a track provided based on the base frame 101, but is installed in parallel with the guide rail 102 above the base frame 101 so as to be slidable along the guide rail 102. It serves to drag and move the transfer jig 120. It can be noted that the timing belt 110 is provided in a reverse type in a reversed form so that the teeth 111 face the outside rather than the inside of the track as described above. In this way, according to the configuration provided with the reverse-type timing belt 110, the position control is easier, and the transfer jig 120 is docked to the guide rail 102 and at the same time, it is guided to be directly engaged with the timing belt 110 and transferred. Since it becomes easy to make the jig 120 in a state in which it can be moved by dragging, a simple configuration is possible. In addition, even if a plurality of transfer modules (100M) operating the tracks of the timing belts 110 independent from each other are connected in the same direction or are connected in opposite directions by the switching member 160, the timing belt 110 is linked and the transfer jig 120 ) To keep moving, you don't need to complicate additional configuration. The effect of having the reverse-type timing belt 110 can be more fully understood by looking at the configurations of the transfer jig 120 and the switching member 160. However, in the case of the timing belt 110 mentioned in the embodiment of the present invention, it means a timing belt made of rubber, polyurethane, or equivalent material, not a chain-type timing belt, and is quieter than when using a chain or gear. The advantage of being able to drive cannot be ignored.

As shown in FIG. 3, the timing belt 110 forms a track by a plurality of idle pulleys 134, and a driving pulley 133 that belongs to the driving unit 130 and receives driving force from the driving motor 131 By receiving the driving force, it circulates along the track.

The transfer jig 120 serves to load and transfer the pallet PL while moving along the guide rail 102 while being docked to be slidable on the guide rail 102. The transfer jig 120 includes a slide portion 123 having a slide groove 123a that is slidably docked to the guide rail 102 at the center of the lower surface of the jig body 121 as shown in FIGS. 10 and 11. Equipped. In addition, in the vicinity of the slide part 123, a meshing portion 122 is provided on the lower surface of the teeth 122a, which are engaged in correspondence with the teeth 111 of the timing belt 110.

Here, the slide groove (123a) of the slide portion (123) is formed to have a wider width than the lower portion as shown in FIG. 11, so that the upper portion can stably maintain a docked state with respect to the guide rail (102) formed to have a wider width. There will be. In this way, if the transfer jig 120 is configured so as not to be lifted from the guide rail 102, the engaging portion 122 of the transfer jig 120 continues to engage with the timing belt 110 even at the moment when a negative reaction force is applied. It will be able to keep it stable.

It should be noted that the engaging portion 122 of the transfer jig 120 is provided on the left and right sides of the slide portion 123, respectively, and one of them is engaged with the timing belt 110. According to this configuration, as shown in FIG. 2, in the state that the transfer module 100M is arranged side by side in the opposite direction for supply and recovery, without turning the transfer jig 120 in the opposite direction, in the supply transfer module 100M. With the transfer module for collection (100M), it is immediately engaged with the timing belt 110 by simply moving from the transfer module for collection (100M) to the transfer module for supply (100M). At this time, the engagement portion 122 of the transfer jig 120 meshed with each timing belt 110 in the supply transfer module 100M and the recovery transfer module 100M are different from each other. However, in order to move the transfer jig 120 between the supply transfer module 100M and the recovery transfer module 100M, the conversion member 160 is required, which will be described again.

In the transfer jig 120, one or more positioning grooves 124 are formed on the lower surface of the jig body 121 to be spaced apart in the front and rear directions. As a result, the transfer jig 120 carrying the pallet PL by the plurality of pallet positioning members 140 installed at a distance along the front and rear direction of the base frame 101 is stopped at the correct position according to the process or transferred. Position control to accurately maintain the distance between the jig 120 becomes possible.

The driving unit 130 is a driving motor 131 that provides a driving force for the timing belt 110 as shown in FIGS. 5 and 8, and a driving for a motor that transmits the driving force of the driving motor 131 in the middle. It comprises a pulley (132a) and a driven pulley (132b) for a motor, and a driving pulley (133) for transmitting a driving force by contacting the timing belt 110 while rotating by the driven pulley (132b) for the motor. Such a driving unit 130 is advantageous in that it is installed at an intermediate point of the base frame 101 in terms of securing an installation space and providing a balanced driving force. The configuration of the driving unit 130 can be changed as much as possible except for the driving motor 131. In the case of the present invention, it is desirable to minimize noise and vibration by thoroughly excluding gears and chains.

The pallet positioning member 140 is provided with a determining member main body 141 fixed to the base frame 101 and a lifting body 142 installed to be elevated from the determining member main body 141. Accordingly, when the lifting body 142 is raised, the upper end of the lifting body 142 is inserted into any one of the positioning grooves 124 of the transfer jig 120, and the transfer jig 120 and the pallet PL It is possible to set the exact position at which they should stop, and to maintain the exact distance between them. With the configuration including the pallet positioning member 140 as described above, it is possible to precisely set the exact position at which the pallet PL should be repeatedly stopped in each assembly process. Here, the pallet positioning member 140 can be simply implemented based on a hydraulic cylinder, a pneumatic cylinder, or other actuators.

The positioning encoder 150a accurately measures the circulation distance of the timing belt 110 by the number of rotations of the rotor rotating in contact with the timing belt 110 in the base frame 101, and from this, the transfer jig 120 ) To calculate the transfer distance of the pallet (PL). In addition, a tooth type detection sensor 150b is further installed together with the positioning encoder 150a. The tooth shape detection sensor 150b detects the teeth of the timing belt 110 to calculate the transfer distance and speed of the pallet PL.

According to the configuration in which both the positioning encoder 150a and the tooth shape detection sensor 150b are installed, precise synchronous driving between each transfer module 100M is possible.

The conversion member 160 serves to move the transfer jig 120 between the transfer module 100M and the transfer module 100M. To this end, the switching member 160 has one end and another in the disconnection section (see 160B FIGS. 3 and 4) of each transfer module 100M arranged parallel to the left side and the right side, as shown in detail in FIGS. 12 and 13. A horizontal base 161, each end of which is arranged in a retracted form, a screw 162 installed along the horizontal base 161 to rotate by a driving force of the motor 165, and the screw 162 penetrates A moving body 163 installed in a screwed state and moving along the screw 162 by rotation of the screw 162, and each transfer while moving together with the moving body 163 by being installed on the upper surface of the moving body 163 It comprises a variable rail 164 for selectively connecting the disconnected guide rail 102 of the module (100M). Here, as shown in FIG. 14, the variable rail 164 is capable of transporting the transfer jig 120 in a state in which all of the slides 123 located at the front and rear ends of the transfer jig 120 are docked. It is provided with a thing of sufficient length.

According to the configuration of the switching member 160, one of the switching members 160 is a transfer jig 120 in a state in which the transfer module 100M is arranged side by side in opposite directions in the left and right sides for supply and recovery. It is connected so that it can be moved from the transfer module for supply (100M) to the transfer module for collection (100M), and the other of the conversion member 160 is transferred to the transfer jig 120 for supply from the transfer module for collection (100M) Connect to move to the module (100M). Then, it is possible to simply build an infinite repetitive circulation system in which the supply and recovery of the pallet (PL) is repeatedly performed.

On the other hand, although not shown in the drawing, when the transfer module 100M is disposed side by side in opposite directions at the top and bottom for supply and recovery, the conversion member 160 can be simply changed to a vertical conversion member accordingly. . That is, the vertical conversion member has a vertical base disposed in a form in which the upper and lower parts are respectively retracted in the disconnection section of each transfer module 100M disposed side by side at the upper and lower sides, and the vertical base is installed along the vertical base to prevent motor driving force. A screw that is rotated by the screw, a moving body that is installed in a screwed state through which the screw passes and moves along the screw by the rotation of the screw, and a moving body installed on the upper surface of the moving body and moving together with the moving body, and each transfer module (100M) ), the disconnected guide rail 102 may be configured in a form including a variable rail that selectively connects. In the case of such a vertical conversion member, since it is only necessary to simply change the horizontal conversion member 160 described in conjunction with the accompanying drawings, further detailed description will be omitted.

The pulley damper 170 is installed at the front end or the rear end of the base frame 101 to elastically support any one of the idle pulleys 134 installed above the front end and the rear end of the base frame 101. As a result, when the transfer jig 120 moves between a plurality of transfer modules 100M connected in a line, it is possible to effectively reduce the impact and noise caused by passing through the disconnected section of the timing belt 110 that is inevitable.

Although the preferred embodiment of the present invention has been described above, the present invention can use various changes, modifications, and equivalents. It is clear that the present invention can be applied equally by appropriately modifying the above embodiments. Therefore, the above description does not limit the scope of the present invention determined by the limits of the following claims.

100M: transfer module 101: base frame
102: guide rail 110: timing belt
120: transfer jig 130: drive unit
140: positioning member 150a: encoder for positioning
150b: tooth type detection sensor 160: switching member
170: pulley damper

Claims (12)

As a pallet transfer conveyor system that transfers product transfer pallets to proceed with the product process,
Including a base frame, a guide rail installed long in the longitudinal direction of the base frame, a timing belt installed side by side in the base frame and circulating along a track, and a drive motor providing a driving force to circulate the timing belt A transfer module that can be used as a device or by connecting two or more; And a transfer jig that is docked to be slidable on the guide rail and moves along the guide rail to transfer the pallet,
The timing belt is provided as a reverse-type timing belt in the form of an inverted shape so that the teeth face the outside of the track, and when the transfer jig is docked on the guide rail, it is engaged with the transfer jig and can be moved by dragging the transfer jig. And
The transfer jig includes a slide portion having a slide groove at a central portion of the lower surface thereof so as to be slidably docked to the guide rail, and a fitting portion formed on the lower surface of the slide portion having teeth that engage with the teeth of the timing belt near the slide portion. And
The guide rail has an upper width wider than that of the lower portion, and the transfer jig has a slide groove formed in an upper width wider than that of the lower portion corresponding to the guide rail, so that the engaging portion engages the timing belt even if a negative reaction force acts. To maintain the state of being
The engagement portion of the transfer jig is provided on the left and right sides of the slide portion, and one of the engagement portions of the transfer jig provided on the left side and the right side, respectively, is engaged with the timing belt, so that the transfer module is used for supply and recovery. Conveyor for pallet transfer, characterized in that the engagement portions of the transfer jig provided on the left side and the right side of the slide part, respectively, can be engaged with the timing belt without turning the transfer jig in the opposite direction in the state of being arranged side by side in the opposite direction. system. delete delete delete The method of claim 1,
A plurality of positioning grooves are formed on the lower surface of the transfer jig to be spaced apart in the front-rear direction,
A plurality of pallet positioning members are installed spaced apart along the front and rear directions of the base frame, and the pallet positioning member consists of a crystal member main body fixed to the base frame and an elevating body installed so as to be elevated from the crystal member main body. , When the lifting body is raised, the upper end of the lifting body is inserted into any one of the positioning grooves of the transfer jig, so that the transfer jig and the pallet can be accurately positioned. . The method of claim 1,
A disconnection section in which the base frame and the guide rail are disconnected is formed at the front end and the rear end of the transfer module,
Including a switching member having a movable variable rail that connects the disconnected guide rail by selectively entering the disconnected section of the guide rail, and moving a transfer jig between a plurality of transfer modules and transfer modules arranged by the conversion member. Conveyor system for pallet transfer, characterized in that to enable. The method of claim 6,
The transfer module is arranged side by side in opposite directions on the left side and the right side for supply and recovery, and one of the conversion members is connected so that the transfer jig can move from the transfer module for supply to the transfer module for collection, and the conversion member The other is a pallet transfer conveyor system, characterized in that the transfer jig is connected to move from the transfer module for collection to the transfer module for supply. The method of claim 7, wherein the switching member,
A horizontal base in which one end and the other end are respectively retracted in the disconnection section of each transfer module arranged in the left and right sides, a screw installed along the horizontal base to rotate by a motor driving force, and the screw Is installed in the state of being screwed through and moves along the screw by rotation of the screw, and is installed on the upper surface of the moving body and moves with the moving body to selectively connect the disconnected guide rails of each transfer module. A conveyor system for conveying pallets, comprising a variable rail. The method of claim 6,
The transfer module is arranged side by side in opposite directions at the top and bottom for supply and recovery, and one of the conversion members is connected so that the transfer jig can move from the transfer module for supply to the transfer module for collection, and the conversion member The other is a pallet transfer conveyor system, characterized in that the transfer jig is connected to move from the transfer module for collection to the transfer module for supply. The method of claim 9, wherein the switching member,
A vertical base in which an upper end and a lower end are respectively retracted in the disconnection section of each transfer module arranged in the upper and lower sides, a screw installed along the vertical base to rotate by motor driving force, and the screw penetrates A variable rail that is installed in a screwed state and moves along the screw by rotation of the screw, and a variable rail that selectively connects the disconnected guide rail of each transfer module while being installed on the upper surface of the moving body and moving together with the moving body. A conveyor system for conveying pallets, comprising: a. delete The method of claim 1,
At least one of the pulleys installed on the front end and the rear end of the base frame is elastically supported by a pulley damper to reduce the impact that occurs when the transfer jig moves between transfer modules connected in a line. A conveyor system for conveying pallets, characterized in that.

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