JP2011256036A - Chain conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chain conveyor to which all components are attached with reference to frames and which can be assembled and shipped with reference to of the frames.SOLUTION: Driven sprockets are provided at the front and rear of each of a pair of right and left frames, and an endless chain is wound between the sprockets. A drive unit having a driving sprocket is mounted on each of the right and left frames, and a driving motor is mounted on one of the right and left frames. The driving sprockets are connected to each other to be driven by a driving shaft. The right and left frames are connected to each other with a connecting member, and the right and left frames are supported by a stand having at least four legs.

Description

  The present invention relates to a chain conveyor.

  A chain conveyor is known in which sprockets are provided before and after a pair of left and right frames, and an endless chain is wound between the front and rear sprockets so that the frame is supported by a stand (for example, Patent Document 1: JP2003-212326A). By the way, if the functional parts of the chain conveyor are dispersed on the frame side and the stand side, it is necessary to assemble the frame and the stand together, which is inefficient and the stand is bulky, so a large space is required for transportation. Become.

JP2003-212326A

  An object of the present invention is to provide a chain conveyor that can be assembled and shipped on the basis of a frame by assembling all parts on the basis of the frame.

The present invention is a chain conveyor comprising a pair of left and right frames, sprockets provided before and after each of the pair of left and right frames, and an endless chain wound between the sprockets,
The sprockets provided before and after the frame are driven sprockets,
A drive unit comprising drive sprockets and attached to each of the left and right frames;
A single drive motor attached to one of the left and right frames;
A drive shaft driven by the drive motor to connect and drive the drive sprockets;
A connecting member for connecting the left and right frames;
A stand having at least four legs and being attachable to the left and right frames is provided.

  In this invention, the functional parts of the chain conveyor are attached to the left and right frames, and the left and right frames are connected by the connecting member during transportation or the like to constitute a frame unit. When each part is assembled to the frame and the frames are connected by a connecting member, the frame unit is completed. When the stand is attached after transportation, the chain conveyor is completed. The connecting member may be removed when the stand is assembled to the frame unit, or may be left as it is.

  Preferably, members having two parallel plate portions with a gap are attached to both front and rear ends of the left and right frames, and the driven sprocket is supported in the gap. In this way, since the driven sprocket is attached to the members at both ends of the frame, the driven sprocket can also be attached using the frame as a reference.

  The driven sprocket includes a gear portion and a shaft, the gear portion is rotatable with respect to the shaft, and there is a bearing or a bush between the gear portion, that is, a portion having teeth that mesh with the chain, and the shaft. Then, the surface along the diameter direction of the shaft is notched at both ends of the shaft to form a surface notch portion, and the surface notch portion is fitted so as to abut on a groove provided in the plate-like portion. The surface notch portion may be only one surface, but preferably two opposing surfaces are notched at both ends of the shaft. In this way, the driven sprocket can be assembled simply by fitting the shaft of the driven sprocket into the groove.

  Particularly preferably, the width of the member having the two parallel plate-like portions in the left-right direction is narrower than the width of the frame in the left-right direction. For this reason, when transporting or arranging the chain conveyor so as to abut against each other, the two plate-like portions can be arranged in the front-rear direction. Therefore, a frame unit or a chain conveyor can be arranged in a space-saving manner.

  Preferably, the stand or the connecting member is provided with a portion for positioning with respect to a reference line provided on the floor surface. The positioning portion is a hole for hanging a weight or a reference position for positioning a laser centering machine or the like. Since the stand or the connecting member is positioned with respect to the frame unit and the stand or the connecting member is positioned with respect to the reference line provided on the floor surface, the chain conveyor can be positioned with reference to the frame unit.

The pair of left and right frames are further provided with a sensor for detecting a load and a control unit for controlling the drive motor, connected by the connecting member to form a frame unit, and by attaching a stand to the frame unit. The chain conveyor is designed to be assembled. If it does in this way, each part can be assembled | attached centering on a pair of right and left frames, it can connect with a connection member, and can be transported to an installation place. When the stand is attached, the chain conveyor is completed.

Plan view of the chain conveyor of the embodiment The principal part perpendicular direction sectional view which shows the right-and-left flame | frame in an Example, a crossing board, and a chain Vertical sectional view of the frame in the embodiment Side view of the return side chain rail in the embodiment The top view which shows the decomposition | disassembly state of the chain rail of the return side in an Example Side view of the main part with a notch, showing the drive unit in the embodiment Plan view of idler sprocket in the embodiment Side view of idler sprocket in an embodiment The top view which shows the attachment of the idler sprocket in an Example Side view showing installation of idler sprocket in embodiment Diagram showing idler sprocket placement between adjacent conveyors Side view showing the conveyor body with the stand removed and stacked The top view which shows the stand in an Example Cross section of the main part in the vertical direction showing the connection between the leg and the frame in the embodiment Plan view of the cross board in the embodiment The figure which shows the attachment screw of the cross board in an Example The figure which shows the state which changed the head of the attachment screw of FIG. The top view which shows the adjustable guide and its attachment member in an Example XV-XV sectional view of FIG. Plan view of the fixed guard in the embodiment Side view of fixed guard in embodiment Side view of conveyor with adjustable guide and fixed guard

  In the following, an optimum embodiment for carrying out the present invention will be shown. The scope of the present invention should be determined according to the understanding of those skilled in the art based on the description of the scope of the claims, taking into account the description of the specification and well-known techniques in this field.

  The chain conveyor 2 of an Example is demonstrated with reference to FIGS. The chain conveyor 2 is used for an automatic warehouse loading / unloading station, a general-purpose accumulation conveyor, a sorting conveyor, and the like. The chain conveyor 2 includes a frame unit 4 and a stand 6, and is completed when the frame unit 4 is attached to the stand 6. The stand 6 includes four or more legs 7. The legs 7 may or may not be connected to each other by beams or diagonal materials. The frame unit 4 is connected to the left and right frames 8 and 9 on the wiring receiver 11, the driving motor 12, the driving shaft 14, the driving unit 16, the control unit 18, the striker unit 20, the idler unit 22, the endless chain 28, and the fixed guard. A part such as a guard and a guide such as 26 are attached and connected by a connecting bar 10. The chain 28 is wound around the front and rear idler sprockets 22 and is pulled out from the bottom of the frames 8 and 9 into the drive unit 16 and driven.

  When the frame unit 4 and the stand 6 are transported as separate bodies, the stand 6 can be disassembled and transported while lying down, so that the chain conveyor 2 does not become bulky. When transporting, the left and right frames 8 and 9 are connected to each other by, for example, a pair of connecting bars 10 and 10, and the connecting bar 10 may be removed when the stand 6 is attached or may be left attached. The connecting member may have a shape other than the bar shape.

  The striker unit 20 detects a load on the chain conveyor 2, and includes a movable element 21 that can be moved in and out with respect to a conveying surface determined by the upper surface of the chain 28, and a limit switch that detects the position of the movable element 21. A photoelectric sensor or the like may be used instead of the striker unit 20. The idler unit 22 includes idler sprockets 24 and is provided at both front and rear ends of the frames 8 and 9. The drive unit 16 is attached to the long groove 35 (FIG. 2) at the bottom of the frames 8 and 9 between the front and rear idler units 22 and 22 and drives the return side of the chain 28. The drive motor 12 is attached only to one frame, here the frame 9, and drives the left and right drive units 16, 16 via the drive shaft 14. The control unit 18 is attached to the frame opposite to the motor 12, here the inner side surface of the frame 8, using the long grooves 40 and 41 of FIG. 2. The control unit 18 controls the motor 12 by a signal from the striker unit 20, a signal from another chain conveyor 2 connected to the front and rear, and the like. The control unit 18 also controls the attachment of parts such as lifters to the chain conveyor 2. The striker unit 20 and the wiring receiver 11 are also attached to the frame 8 on the same side as the control unit 18.

  As described above, in the chain conveyor 2 of the embodiment, all functional parts are attached to the frame unit 4. The frame unit 4 and the stand 6 are separately manufactured and transported separately. When the frame unit 4 is fixed to the stand 6 at the site, the chain conveyor 2 is completed.

  FIG. 2 shows the structure of the frames 8 and 9. The frames 8 and 9 are made of an extruded material such as aluminum, have a uniform shape along a direction perpendicular to the paper surface of FIG. 2, and the long extruded material is cut into a desired length. 9 is obtained. The long grooves 32, the long grooves 35, and the long grooves 40 to 43 provided in the frames 8 and 9 extend in a constant shape over the entire length of the frames 8 and 9. Note that the frames 8 and 9 may be made of a steel drawing material or the like instead of aluminum. The frames 8 and 9 have an inverted U-shaped cross section, and a long groove 35 extends upward from the opening 36 at the bottom. The long groove 35 extends over the entire length of the frames 8 and 9 and extends in the longitudinal direction of the frames 8 and 9. Parallel. Further, the return side of the chain 28 is accommodated in the long groove 35. A partition 39 indicated by a chain line may be provided in the long groove 35. Protrusions 37 and 37 are provided on both sides of the opening 36 at the bottom of the frames 8 and 9 to support several return side chain rails 38. A long groove 32 is provided on the upper surfaces of the frames 8 and 9, and supports a chain rail 34 made of synthetic resin or the like. The drive unit 16 and the legs 7 of the stand 6 are attached to the long groove 35 through the opening 36. The legs 7 may be attached not to the long grooves 35 but to the long grooves 41 and 43 on the side surfaces.

  The frames 8 and 9 are each provided with two long grooves 40 to 43 on the side surface (inner side surface) facing the inner side of the frame unit 4 and the side surface (outer side surface) facing the outer side of the frame unit 4 respectively. Yes. The long grooves 40 to 43 have a wider width at the top and bottom than the width at the top and bottom of the opening. In this specification, the right and left are directions perpendicular to the longitudinal direction of the frames 8 and 9 in the horizontal plane and also perpendicular to the conveying direction of the chain conveyor 2 in the horizontal plane. The front and rear are the longitudinal directions of the frames 8 and 9 and the transport direction of the chain conveyor 2.

  The connecting bar 10, the wiring receiver 11, the control unit 18, the striker unit 20 and the like are attached to the long grooves 40 and 41 on the inner side surface. Further, the fixed guard 26 and an adjustable guide 88 described later are attached to the long grooves 42 and 43 on the outer surface. Further, the idler unit 22 is attached to the long grooves 40 to 43. In FIG. 2, reference numeral 44 denotes a bridge plate, and 45 denotes a rib portion. As described above, all the parts other than the stand 6 are attached to the frames 8 and 9 to constitute the frame unit 4.

  FIG. 3 shows the frame 9 alone, and the frame 8 has the same shape as the frame 9. 4 shows the chain rail 38 on the return side as seen from the direction parallel to the longitudinal direction of the frames 8 and 9, and FIG. The chain rail 38 is mainly composed of a synthetic resin trapezoidal sliding portion 38a, a steel main body 38b in which H steel is laid down, and a steel nut plate 38e, and an upper side 38c of the main body 38b. Further, the sliding portion 38a is attached by the bolt 39b and the nut 39d. Further, the protrusion 37 is sandwiched between the lower side 38d of the main body 38b and the nut plate 38e, and the chain rail 38 is fixed to the frames 8 and 9 by the bolt 39a and the female screw portion 39c of the nut plate 38e. The return-side chain rail 38 does not need to be provided over the entire length of the frames 8 and 9, for example, between the idler unit 22 and the drive unit 16 in FIG. 1 and in the vicinity of the center in the longitudinal direction of the frames 8 and 9. The total number of the frames 8 and 9 is 2-6.

  FIG. 6 shows the drive unit 16. Reference numeral 48 denotes a case, which is attached to, for example, the long groove 35 by a bolt 57 and a nut plate 58. Reference numeral 50 denotes a drive sprocket which is rotated by the drive shaft 14. As shown in FIG. 1, the drive shaft 14 is driven by one drive motor 12, and the drive sprocket 50 is driven by the drive shaft 14. Reference numerals 51 to 53 denote idler sprockets, which adjust the tension of the chain 28 by adjusting the position of the idler sprocket 53 in the front-rear direction. Reference numeral 54 denotes a mounting tool for the idler sprocket 53, which is attached to the case 48 so as to be slidable forward and backward (left and right in FIG. 6). The idler sprocket 53 is slid back and forth by screwing the bolt 56 into the screw hole of the fixture 54 and rotating the bolt 56. Instead of providing the idler sprocket 53, a position adjusting mechanism for the idler sprocket 24 may be provided in any one of the front and rear idler units 22. In addition to the components shown in FIG. 6, the drive unit 16 includes a cover that covers the opening of the case 48. The drive unit 16 is attached to the long groove 35 of the frames 8 and 9, and the chain 28 is drawn from the long groove 35 into the drive unit 16. In this specification, the front-rear direction refers to the longitudinal direction of the frames 8, 9, that is, the conveying direction, and the left-right direction is the direction connecting the frames 8, 9 and is horizontal and perpendicular to the front-rear direction.

  7 to 10 show the idler unit 22 and the like. FIGS. 7 and 8 show the idler sprocket 24, 60 is a gear portion that meshes with the chain 28, 62 is a bearing, 64 is a sprocket shaft, and has notches 66, 66 with two front and rear surfaces as vertical surfaces at both ends. Provide. The idler unit 22 is provided at both front and rear ends of the frames 8 and 9, and 70 is a plate-like mounting portion, and the idler unit 22 is attached to the frames 8 and 9 by using bolts 72, nut plates 73, and the like using the long grooves 40 to 43. Install. Two mounting plates 74 and 74 that are parallel to each other protrude from the mounting portion 70 with a gap larger than the thickness of the idler sprocket 24, and the mounting plate 74 extends from the center of the upper surface to the vicinity of the center along the height direction. A vertical groove 76 is cut. The width of the groove 76 is equal to the thickness between the surface notches 66, 66 of the sprocket shaft 64. The sprocket shaft 64 is fitted into the groove 76 and the surface notch 66 is brought into contact with the groove 76, whereby the idler sprocket 24. Is attached to the idler unit 22. Instead of providing a pair of surface notches 66, 66, only one surface may be provided.

  As shown on the left side of FIG. 7, groove-like surface notches 67 and 67 may be provided on the sprocket shaft 64 ′, and the surface notches 67 and 67 may be fitted into the grooves 76. The surface notches 66, 66 and the like face each other along the diameter direction of the shaft 64 and the like. In addition, the surface which comprises the notch part 66, the groove | channel 76, etc. is not restricted to a vertical surface, A horizontal surface etc. may be sufficient. For example, when the notched portion 66 or the like is configured as a horizontal plane, tension is applied to the shaft 64 or the like from the chain 28 and is pressed and fixed to one of the grooves 76. However, if the tension varies, the shaft 64 or the like may swing. As in the embodiment, if the notches 66, 66, 67, 67 are configured as vertical surfaces and the groove 76 is also a vertical groove, the sprocket shafts 64, 64 'can be moved even if the tension on the chain 28 varies. Does not swing.

  If the idler sprocket 24 is exposed, there is a risk of touching foreign matter. Therefore, the front and rear end portions of the idler sprocket 24 are detachably covered with a cover 78 provided by bending the plate material. The cover 78 is provided with dowels (convex portions) 80, 80 provided by, for example, half punches on both side surfaces, and is fitted into concave portions 81, 81 formed of small holes provided in the mounting plate 74 by drilling or the like. Thus, when the force pushed out from the attachment plate 74 side is added to the cover 78, it attaches so that a fitting may be removed. The cover 78 may be provided with a recess 81 and the mounting plate 74 may be provided with a dowel 80, but it is difficult to provide a dowel on the thick mounting plate 74. Here, when a foreign object is sandwiched between the cover 78 and the idler sprocket 24, the cover 78 is pushed by the foreign object and is detached from the mounting plate 74. This prevents the chain conveyor 2 from being damaged. What is necessary is just to make it the cover 78 remove | deviate from the attachment plate 74 when a foreign material is pinched | interposed, and it may replace with a fitting and may attach the cover 78 to the attachment plate 74 with a permanent magnet, for example. Alternatively, the left and right protruding pieces 79 of the cover 78 may be bent inward so as to contact the mounting plate 74 with a spring force. When a force exceeding the frictional force determined by the spring force is applied, the cover 78 is removed. In these cases, the dowel 80 and the recess 81 are unnecessary.

  FIG. 11 shows an example in which the frame units 4 are stacked in the front-rear direction. The width of the idler unit 22 in the left-right direction is narrower than the width in the left-right direction of the frames 8, 9, and the two idler units 22, 22 can be arranged so as to overlap in the front-rear direction. Therefore, the frame unit 4 can be transported in a space-saving manner, or the chain conveyor 2 can be installed in a space-saving manner.

  Reference numeral 82 in FIG. 11 is a beam connecting the left and right legs 7, 7, and a positioning hole 84 that penetrates the beam 82 is provided at the center in the left-right direction. For example, the chain conveyor 2 is positioned by hanging a weight attached to the thread from the hole 84 and aligning it with an attachment line 85 (FIG. 1) drawn on the floor of the building. The positioning hole 84 may be provided in the connecting bar 10, or a reference position for attaching the laser centering machine may be provided instead of the positioning hole 84.

  FIG. 12 shows the frame units 4 stacked during transportation, the stand 6 is not attached, and the frames 8 and 9 are connected by the connecting bar 10 of FIG. A beam 86 slightly higher than the motor 12, the drive unit 16, and the control unit 18 is disposed between the upper and lower frame units 4. Further, the stand 6 is transported, for example, in two parts in the front-rear direction or separated into parts such as the leg 7 and the beam 82, the beams 92 and 94 in FIG. If it does in this way, since it can transport without attaching frame unit 4 to stand 6, there is no bulk for the height of stand 6, and transportation efficiency is high.

  FIG. 13 shows the stand 6, which includes at least four legs, front, rear, left, and right. The left and right legs are connected by a beam 82 and a beam 92, and the front and rear legs are connected by a beam 94. However, the beams 82, 92, and 94 need not be provided.

  FIG. 14 shows the attachment of the legs 7 to the frames 8 and 9. The leg 7 includes a protruding portion 90 that fits into the opening 36 at the bottom of the frames 8 and 9, and the leg 7 is coupled to the frames 8 and 9 by a plate 91, bolts 91 a, and nuts 91 b. The protruding portion 90 of the leg 7 is positioned with respect to the left and right direction of the frame unit 4 through the openings 36 of the frames 8 and 9. Therefore, the positioning hole 84 positioned with respect to the leg 7 can be positioned in the left-right direction of the frame unit 4.

  15 to 17 show the attachment of the cross plate 44. FIG. The crossing plate 44 is a plate made of steel or the like for an operator to walk on the chain conveyor 2, 98 is an in / out hole of the mover 21 of the striker, 45 is a front / rear rib, and both ends of the crossing plate 44 are attached to the frames 8 and 9. It is placed and supported on the upper surface. For example, there are long holes 96 in the vicinity of the four apexes of the cross plate 44, and the cross plate 44 is attached to the long grooves 40 of the frames 8 and 9 using, for example, the long holes 96 and 96 at two positions in the diagonal direction. The long holes 96 are arranged not only in the vicinity of the apex of the cross board 44 but also in the vicinity of both ends of the cross board so as to remove the area overlapping the frames 8 and 9 in the vertical direction. The direction of the long hole 96 is arbitrary, and a round hole may be provided in place of the long hole 96, but it is troublesome to pass the mounting screw 46 therethrough. The delivery plate 44 may be arranged so as to span between the frames 8 and 9 without a gap, or may be arranged with an interval.

  As shown in FIG. 16, the mounting screw 46 is bent into a U shape at the tip to form the hook portion 101, has a screw portion 100 in the middle, and has a notch 102 or 103 at the base end (head). . A −-shaped notch 102 and a + -shaped notch 103 are shown in the upper right of FIG. 104 is a nut and 105 is a washer. A straight portion between the head and the hook portion 101 is referred to as a shaft 106 of the screw 46. When the mounting screw 46 is turned through the long hole 96 and the direction of the hook portion 101 is changed, the hook portion 101 can be hooked on the upper opening portion of the long groove 40. When the nut 104 is tightened, the crossing plate 44 can be fixed. After fixing, if the head of the screw 46 is inflated by hitting the notches 102 and 103 with a hammer or the like, the nut 104 cannot be detached from the mounting screw 46, and the screw 46 can be prevented from falling off. Note that the nut 104 is preferably attached before the screw 46 is passed through the long hole 96.

  Here, if the movable area A above the nut 104 is made longer than the depth B at which the hook portion 101 is hooked on the frames 8 and 9, the nut 104 can be loosened and the connecting plate 44 can be removed from the frames 8 and 9. . As shown in FIG. 17, if the depth from the tip of the hook portion 101 to the top surface of the bottom portion is B ′, B <B ′ <A. Therefore, if B ′ <A, B <A is always satisfied.

  18 to 22 show the attachment of the adjustable guide 88 (FIGS. 18 and 19) and the fixed guard 26 (FIGS. 20 to 22). The adjustable guide 88 is a member that corrects the position in the left-right direction of the load, such as a pallet, and is frequently brought into contact with the load and arranged close to the chain 28. For this reason, the adjustable guide 88 makes it possible to adjust the position in the left-right direction, which complicates the mounting structure. The guard 26 is a member that prevents the baggage from deviating left and right and dropping off from the chain 28 and the like. The guard 26 is arranged away from the chain 28 to the left and right, so that the position need not be adjusted and the mounting structure is simple.

  18 and 19 show the structure of the adjustable guide 88. FIG. Reference numeral 110 denotes a guide surface composed of an inclined surface that is inclined outward from the vertical direction, and guides the left and right end portions of the load and positions the load with respect to the chain 28 when receiving the load from an automatic transfer device or the like. For example, 112 is a horizontal mounting surface, and 114 is a long hole for position adjustment. Reference numeral 116 denotes a fixture, and the adjustable guide 88 is attached by a hole 118 on the upper surface, a bolt 122, a nut (not shown), and the like. The fixture 116 is attached to, for example, the long groove 42 of the frames 8 and 9 by the hole 120, the bolt 123, and a nut plate (not shown).

  20 and 21 show the fixed guard 26, and 130 is a vertical guard surface, which may be an inclined surface, and comes into contact with a load shifted to the left and right to prevent the chain 28 and the like from falling off. Reference numeral 132 denotes, for example, a vertical attachment surface, and the fixed guard 26 is attached to, for example, the long groove 42 of the frames 8 and 9 with bolts 134, nut plates 135, and the like.

  FIG. 22 shows the chain conveyor 2 with an adjustable guide 88 and a fixed guard 26 attached. Reference numeral 142 denotes a lifter, for example, which lifts and lowers a pair of support portions 144 and 144 by a pantograph mechanism or the like, and delivers a load such as a pallet 146 to and from a slide fork of a stacker crane. At the right end of the chain conveyor 2 in FIG. 22, a package is delivered between a tracked carriage, an automated guided vehicle, and the like. The adjustable guide 88 is provided at a position for delivering the cargo to / from an automatic transfer device such as a stacker crane, a tracked carriage, an automatic guided vehicle, etc., and corrects the lateral position of the cargo. The automatic transfer device is, for example, a slide fork or a scalar arm.

  The fixed guard 26 prevents the package being transported from dropping between the adjustable guides 88, 88, the width W along the transport direction (front-rear direction) is shorter than the width L of the package, and the fixed guard 26, The gap L 'between the fixed guard 26 and the adjustable guide 88 is also shorter than the width L of the load. The gap L ′ between the fixed guards 26 and 26 does not need to be constant, and the gap between the fixed guard 26 and the adjustable guide 88 does not need to be constant. In this way, the position of the load in the left-right direction is adjusted by the adjustable guide 88 at the time of delivery to and from the automatic transfer device, and the load is prevented from falling off the chain conveyor 2 by the fixed guard 26.

  In the embodiment, since the drive unit 16 can be provided at the bottom of the frames 8 and 9, the idler units 22 and 22 can be provided before and after the frames 8 and 9. Therefore, it is not necessary to provide the motor 12 at the ends of the frames 8 and 9. Since the tension to the chain 28 can be adjusted in the drive unit 16, there is no need to adjust the tension on the idler unit 22 side. Therefore, the idler sprocket 24 can be easily attached as shown in FIGS. Then, the end of the idler unit 24 is detachably covered with a cover 78, and the cover 78 is removed when a foreign object is caught.

  All parts other than the stand 6 are attached to the frames 8 and 9, and the frames 8 and 9 are connected by connecting bars 10 and 10. Therefore, even without the stand 6, the parts can be attached to the frames 8 and 9 with high accuracy. Can be attached. Further, the long grooves 40 to 43 on both the left and right sides of the frames 8 and 9 can be used for mounting the parts, and the long grooves 35 can be used for mounting the drive unit 16, the legs 7, etc., and can also be used for mounting the chain rail 38. The long grooves 32 on the upper surfaces of the frames 8 and 9 can be used for attaching the chain rail 34. Since the frame unit 4 can be assembled with high accuracy, the fixed guard 26 can be used without the need to correct the left-right direction position of the load except for the transfer part with the automatic transfer device. In addition, the long groove 35 is not provided, the chain rail 38 is disposed in the hollow portion where the four circumferences of the frames 8 and 9 are closed, and the mounting portion of the drive unit 16 and the leg 7 is attached to the long grooves 41 and 43 of the frames 8 and 9. Also good.

In the embodiment, the structure of the chain conveyor 2 has been described, including parts not directly related to the claims. However, the structure is arbitrary for portions not related to the claims. In addition, the scope of the claims is not limited by the embodiments in the portions corresponding to the claims.

2 Chain conveyor 4 Frame unit 6 Stand 7 Legs 8 and 9 Frame 10 Connection bar 11 Wire receiver 12 Motor 14 Drive shaft 16 Drive unit 18 Control unit 20 Striker unit 21 Movable element 22 Idler unit 24 Idler sprocket 26 Fixed guard 28 Chain 34, 38 Chain rail 32 Long groove 35 Long groove 36 Opening 37 Projection 40-43 Long groove 44 Crossing plate 45 Rib 46 Mounting screw 48 Case 50 Drive sprocket 51-53 Idler sprocket 54 Mounting tool 56, 57 Bolt 58 Nut plate 60 Gear part 62 Bearing 64 Sprocket Shaft 66 Face notch portion 70 Mounting portion 72 Bolt 73 Nut plate 74 Mounting plate 76 Groove 78 Cover 80 Dowel 81 Recess 82 Beam 84 Positioning hole 85 Mounting line 86 Girder 88 Adjustment Possible guides 92, 94 Beam 96 Long hole 98 Recessed hole 100 Screw part 101 Hook part 102, 103 Notch 104 Nut 105 Washer 110 Guide surface 112 Mounting surface 114 Long hole 116 Mounting tool 118, 120 Hole 122, 123 Bolt 130 Guard surface 132 Mounting surface 134 Bolt 135 Nut plate 140 Beam 142 Lifter 144 Support part 146 Pallet

Claims (6)

A chain conveyor comprising a pair of left and right frames, sprockets provided before and after each of the pair of left and right frames, and an endless chain wound between the sprockets,
The sprockets provided before and after the frame are driven sprockets,
A drive unit comprising drive sprockets and attached to each of the left and right frames;
A single drive motor attached to one of the left and right frames;
A drive shaft driven by the drive motor to connect and drive the drive sprockets;
A connecting member for connecting the left and right frames;
A chain conveyor comprising at least four legs and a stand that can be attached to the left and right frames.   The member including two parallel plate-like portions with a gap is attached to both front and rear ends of the left and right frames, and the driven sprocket is supported in the gap. Chain conveyor.   The driven sprocket includes a gear portion and a shaft, the gear portion is rotatable with respect to the shaft, and a surface along a diameter direction of the shaft is notched at both ends of the shaft to form a surface notch portion. The chain conveyor according to claim 2, wherein the portion is fitted so as to abut on a groove provided in the plate-like portion.   The chain conveyor according to claim 3, wherein a width of a member having the two parallel plate-like portions in the left-right direction is narrower than a width in the left-right direction of the frame.   2. The chain conveyor according to claim 1, wherein a portion for positioning with respect to a reference line provided on a floor surface is provided on the stand or the connecting member. The pair of left and right frames are further provided with a sensor for detecting a load and a control unit for controlling the drive motor, and are connected by the connecting member to constitute a frame unit,
The chain conveyor according to claim 1, wherein a chain conveyor is assembled by attaching a stand to the frame unit.

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