JPH0858938A - Pallet conveying device - Google Patents

Abstract

PURPOSE: To carry out the smooth conveyance of a pallet in a bent path of a corner part of a conveyor in a fixing flow-type pallet conveying device. CONSTITUTION: A pallet conveying device for conveying a conveying article after placing it on a pallet 1 through a process of attaching the pallet 1 to an endless feeding belt 5 is provided with guide parts 6, 7 having the shape matching the shape of the conveying path of the feeding belt 5, and a guided part having the shapes matching the guide parts 6, 7, and formed on a part of the pallet 1. The pallet 1 is moved along the conveying path of the feeding belt 5 by guiding the guided part along the guide parts 6, 7 in a state where the part having the shape matching guided part on the pallet side and the guide parts 6, 7 are slid.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pallet transfer device for use in a line or the like in which a pallet to be transferred is used and assembly is carried out by working units arranged along a transfer path.

[0002]

2. Description of the Related Art When an assembly is conveyed along a conveying path in an assembly line or the like, a pallet is provided on a conveyor such as an endless feed belt or rollers arranged on the conveying path, and the conveyed article is placed on the pallet. There is known a pallet transporting device that transports a pallet. In this pallet transfer device, one in which the pallet is movable with respect to the conveyor (free flow type) and one in which the pallet is fixed to the conveyor (fixed flow type) are known.

In the fixed flow type, since a plurality of pallets fixed to the conveyor feed belt are conveyed and stopped all together as the feed belt moves, the pallet feed and stop mechanism is simplified, and the free flow Unlike the type, it is not necessary to collect and forward the pallet at the end of the conveyor, and it is possible to continue the transportation with the pallet attached to the conveyor.

Further, in the fixed flow type pallet conveying device, an angular differential is generated between the flat and solid pallet and the feed belt at the curved portion of the corner where the feed belt turns, so that the pallet is usually used. It is attached to the belt only at one point or a line transverse to the direction in which the feed belt moves. For this reason, when the feed belt is moved at a high speed, the front and rear parts of the pallet in the moving direction of the pallet may vibrate in a bending direction, which may cause noise or damage the pallet. There was a problem in transporting.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fixed flow type pallet transfer device, which enables smooth transfer of a pallet in a curved path portion of a feed belt such as a corner portion of a conveyor. To do.

[0006]

SUMMARY OF THE INVENTION The present invention is a pallet transporting apparatus for mounting a pallet on an endless feed belt, and placing and transporting a transported object on the pallet, in a curved portion of a transport path of the transport belt. A guide portion having a curved guide portion having a shape corresponding to the curved shape, and a guided portion having a shape corresponding to the guide portion and formed on a part of the pallet are provided. The aforementioned object is achieved by moving the pallet along the conveying path of the feed belt by guiding the guided portion along the guide portion while sliding the corresponding shaped portions of the guide portion. .

The guide portion of the present invention is provided along the conveying path of the feed belt and has a shape corresponding to the conveying path, and the guided portion formed on a part of the pallet is guided along the guide portion. It is intended to guide the transportation by moving it.

Further, as one mode of the curved guide portion of the guide portion, the curved portion having a shape along the path of the feed belt, which guides the pallet from the inner side of the curve, is continuously formed with the curved portion. It is possible to adopt a configuration including adjacent linear portions. The curved portion can be formed by the curved guide surface, and the movement of the pallet can be guided by sliding a part of the pallet on the curved guide surface. The guided portion on the pallet side that slides on the curved guide surface can be configured by a sliding surface having the same curvature as the curved guide surface.

Further, in the curved portion of the conveying path of the feed belt, the curved guide portion of the guide portion may be provided with support surfaces for sandwiching both side surfaces of the pallet. Further, a linear guide portion can be provided in a linear portion adjacent to the curved portion of the conveying path of the feed belt. As another aspect of the curved guide portion of the guide portion of the present invention, a curved guide surface having a shape along the path of the feed belt for guiding the pallet from the outer side of the curved portion is provided, and the curved guide surface slides on the curved guide surface. It is possible to adopt a configuration including a guided portion on the pallet side in which the moving sliding surfaces have the same curvature.

As another aspect of the bending guide portion of the guide portion of the present invention, a guide groove having a shape on a side portion of the feed belt in the bending portion and along a path of the feed belt is provided, and a pallet side cover is provided. The guide portion may be configured to include a protruding portion fitted in the guide groove. Further, in still another aspect of the curved guide portion of the guide portion of the present invention, the feed belt itself can be used as the curved guide portion, and the guide surface for guiding the pallet is configured as the outer peripheral surface of the feed belt, and the pallet side is provided. It is possible to form a groove portion having the same curvature as the curvature of the outer peripheral surface of the feed belt in the curved portion and position the feed belt in the groove portion.

[0011]

According to the present invention, the pallet is attached to the endless feed belt, the article is placed on the pallet, and the article can be conveyed together with the pallet by driving the feed belt. Various processing can be performed.

In the pallet conveyor according to the present invention, a guide portion having a shape corresponding to the shape of the conveying path of the feed belt, and a guided portion having a shape corresponding to the guide portion and formed on a part of the pallet are provided. In, the guided portion is guided along the guide portion while the corresponding shaped portions are slid. By this guiding operation, the pallet moves along the conveyance path of the feed belt, and smooth conveyance can be performed without vibration even in a curved path such as a corner of the conveyor.

The guide portion in the curved portion of the conveying path of the feed belt is formed by a curved guide portion having a shape corresponding to the curved shape of the conveying path of the feed belt.
Then, the curved guide portion is provided with a curved shape portion having a shape along the path of the feed belt, which guides the pallet from the inner side of the curve, and which is continuously adjacent to the curved shape portion. In the case of the configuration, a curved guide surface is formed on the curved portion, and the movement of the pallet is guided by sliding a part of the pallet on the curved guide surface,
In the curved portion of the conveying path of the feed belt, it is possible to reduce vibration in the vertical direction with respect to the traveling direction of the feed belt of the pallet.

Further, a straight line guide portion is provided in a straight line portion adjacent to the curved portion of the feed path of the feed belt, whereby the straight line portion of the feed path of the feed belt is vertically moved with respect to the traveling direction of the feed belt of the pallet. Vibration can be reduced. Further, at this time, in the curved portion of the conveying path of the feed belt, the curved guide portion of the guide portion is provided with a support surface for sandwiching both side surfaces of the pallet, and the support surface supports the pallet from both side portions and the traveling direction of the feed belt. It is also possible to prevent blurring in the direction orthogonal to.

The curved guide portion of the guide portion of the present invention is
In the case where the pallet has a shape along the path of the feed belt and has a curved guide surface that guides the pallet from the outside of the curved portion, and the guided portion has a shape corresponding to the curved guide surface,
By sliding a part of the pallet on the curved guide surface and guiding the pallet from the outside of the conveying path of the feed belt, in the curved portion of the conveying path of the feed belt, with respect to the traveling direction of the feeding belt of the pallet. Vertical vibration can be reduced.

Further, the curved guide portion of the guide portion of the present invention is
In the case where the guide groove is formed on the side of the annular feed belt along the path of the feed belt, and the guided portion on the pallet side is provided with the protruding portion fitted into the guide groove, By inserting the protrusion into this guide groove and guiding the pallet along the conveyance path of the feed belt, the curved portion of the conveyance path of the feed belt can move in the vertical direction with respect to the traveling direction of the feed belt of the pallet. Vibration can be reduced.

Further, when the curved guide portion of the guide portion of the present invention is used as the outer peripheral surface of the feed belt and the groove portion having the same curvature as the curvature of the outer peripheral surface of the feed belt in the curved portion is formed on the pallet side, the feed belt is formed. In the curved portion of the pallet, by guiding the edge portion of the groove along the outer peripheral surface of the feed belt, vibration in the vertical direction with respect to the traveling direction of the feed belt of the pallet is generated in the curved portion of the conveyance path of the feed belt. Can be reduced. In this case, the curved portion of the feed belt enters the groove on the pallet side,
It does not hinder the movement of pallets.

[0018]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 2 is a schematic diagram showing the overall configuration of the pallet carrying device of the present invention. In FIG. 2, the pallet 1 has a plurality of pallets 1a to 1d, which are installed on the endless feed belt 5 with a space therebetween, and index feeding is performed by the index device 13. The feed belt 5 has a working unit 1 along its moving direction.
2 (indicated by 12a to 12d in FIG. 2) are installed, and various kinds of articles are placed on the pallet 1 positioned by the positioning mechanism 14 (indicated by 14a to 14d in FIG. 2). Perform processing, inspection, etc.

The pallet 1, feed belt 5, working unit 12, index device 13 and the like are installed on the base 11 to form a pallet transport device. The feed belt 5 is endless, and the traveling direction is changed at the curved portion. In the present invention, a mechanism is provided on the curved portion and the pallet 1 to prevent vibration and enable smooth transportation.

Hereinafter, a mechanism for preventing vibration in the pallet conveyor of the present invention will be described. (First Embodiment) A first embodiment of the pallet conveyor according to the present invention will be described with reference to FIGS. 1 and 3 to 12. 3 and 4 are exploded perspective views for explaining the structure of the pallet in the first embodiment. The pallet 1 includes a base body 2 and a mounting plate 3 slidably mounted on the base body 2. The base body 2 is fixed to a feed belt 5 by a belt attachment 27, and is conveyed as the feed belt 5 moves. To be done. Further, an engaging member 41 for positioning the pallet is attached to the base body 2 by a fixture 42. FIG. 4B shows a state in which the engaging member 41 is attached.

The base 2 has two legs (first leg 23 and second leg 24) sandwiching the feed belt 5 from both sides in the lower part thereof, and is provided in a recess formed between the legs. The feed belt 5 is sandwiched and fixed by a belt attachment 27.
The lower surfaces of the first leg portion 23 and the second leg portion 24 of the base body 2 are linearly formed at both ends in the traveling direction of the feed belt to form a base body linear portion 25, and an intermediate portion is formed to be curved. Thus, the base curved portion 26 is formed. In the figure, the entire intermediate portion has a curved shape, but only a part has a curved shape,
Other parts may be offset so as not to contact the guide part. The base straight portion 25 and the base curved portion 26 move while being guided by the guide portion in the curved portion of the feed belt, which will be described later.

A first guide groove 21 and a second guide groove 22 are formed on a side portion of the base body 2 along the feed belt 5, and a part of the mounting plate 3 is loosely fitted to the mounting plate 3. Is supported so as to be slidable with respect to the base body 2 in the moving direction of the feed belt 5. The mounting plate 3 is a plate portion slidably installed on the upper part of the base body 2, on which a transported object is mounted, and is a side part of the mounting plate 3 and corresponds to a guide groove of the base body 2. A mounting hole is formed at the position where the guide pin 31 (31a to 31d is shown in FIG. 3) is fitted. The tip of the guide pin 31 is fitted into the grooves of the first guide groove 21 and the second guide groove 22 of the base body 2, and the mounting plate 3 is slid with respect to the base body 2 in the moving direction of the feed belt 5. It is possible.

FIG. 1 is an exploded perspective view for explaining the constitution of the guide portion in the first embodiment, and FIG. 5 is a sectional front view and a plan view showing the constitution of the guide portion in the bending portion.
The guide portion is formed on the curved portion of the feed belt 5 and guides the conveyance of the pallet 1 to convey the pallet 1 with less vibration. In FIG. 1, the configuration of the feed belt 5, the gear portion, and the guide portion in the bending portion is shown in an exploded state.

The feed belt 5 has the pallet 1 mounted on the surface opposite to the feed belt tooth portion 51.
The gear tooth portion 54 of the timing pulley 52 for the feed belt
It is driven by meshing with. The feed belt timing pulley 52 can be driven by an index. Further, a cutout portion 53 is formed in a part of the gear tooth portion 54 of the feed belt timing pulley 52, and when the feed belt 5 is rotated, the cutout portion 53 is formed.
The protruding portion of the belt attachment 27 is fitted into the.

The guide portion is composed of curved guide portions 6 provided on both sides of the feed belt timing pulley 52. One side of the bending guide portion 6 has a first bending guide portion 61.
And the third bending guide portion 63 (in FIG. 5 (a), the first bending guide portion 61 and the third bending guide portion 63 are integrally formed and are shown by diagonal lines), and the other side is , The second bending guide portion 62 and the fourth bending guide portion 64 (in (b) of FIG. 5, the second bending guide portion 62 and the fourth bending guide portion 64 are formed as separate bodies, and with different diagonal lines. It is shown).

The first bending guide portion 61 (the second bending guide portion 6)
2) is provided on the feed belt timing pulley 52 side with respect to the third bending guide portion 63, and the third bending guide portion 63 (fourth
It has a smaller diameter than the curved guide portion 64) and has a curved portion and a linear portion. Second curved guide portion 6
The same applies to the second and fourth bending guide portions 64, and
The curved guide portion 62 is on the gear 52 side, has a smaller diameter than the fourth curved portion 64, and has a curved portion and a linear portion. The curved shape portions of the first curved guide portion 61 and the second curved guide portion 62 form a curved guide surface 68, and the linear portion forms a linear guide surface 67.

The curved surface of the curved base portion 26 and the curved surface of the curved guide surface 68 formed on the substrate 2 of the pallet 1 are formed to have the same curvature, and the curved base portion 26 is made to follow the curved guide surface 68, By moving the pallet 1 while maintaining the state, it is possible to suppress the vibration of the pallet 1 in the bending portion and smoothly pass over a wide range. Also, pallet 1
Of the base body linear portion 25 formed on the base body 2 of FIG.
By moving the pallet 1 along the path, the pallet 1 can be smoothly passed until the feed belt 5 shifts from the straight portion to the curved portion. That is, in the linear guide surface 67, after the rear end of the base linear portion 25 on the front side in the moving direction of the pallet 1 crosses the boundary point A between the linear portion and the curved portion, the midpoint B of the pallet 1 passes through this point A. It is for maintaining the pallet 1 in a stable horizontal state until
The distance d is from the middle point B to the rear end of the base straight portion 25 (FIGS. 6 and 10).

Further, the third bending guide portion 63 and the fourth bending guide portion 64 have the following features when the pallet 1 is passing through the bending portion.
The pallet 1 is configured so as to sandwich both side surfaces thereof, which guides the pallet 1 from the lateral direction,
To prevent vibration in a direction orthogonal to the traveling direction of.

A linear guide portion 7 is provided on the linear portion of the feed belt 5. The linear guide portion 7 is composed of a first linear guide portion 71 and a second linear guide portion 72 arranged on both sides of the feed belt 5, and the pallet 1 is provided on the upper end surface thereof.
The pallet 1 is guided in the linear portion of the feed belt 5 by supporting the edge portion of the mounting plate 3.

Next, the operation of the first embodiment will be described with reference to FIGS. FIG. 6 is a perspective view showing a state when the pallet enters the curved portion from the straight portion, and FIG. 7 is a perspective view showing a state in the curved portion of the pallet. 8 to 12 are operation diagrams for explaining the movement of the pallet.

FIG. 8 shows a state in which the pallet 1 has moved along the linear conveying path by the feed belt 5 and has not reached the curved portion. At this time, the base linear portion 25 formed on the base 2 of the pallet 1 is moved along the linear guide surface 67, and the edge portion of the mounting plate 3 of the pallet 1 is moved to the linear guide portion 7 (second linear line in the figure). The guide is provided by being supported on the upper end surface of the guide portion 72).

As the conveyance of the pallet 1 progresses, the tip of the pallet 1 reaches the boundary portion A between the linear shape and the curved shape in the curved portion, as shown in FIG. At this position, as in the case shown in FIG. 8, the pallet 1 has the linear guide surface 6
7 and the linear guide section 7.

Further, when the pallet 1 is further conveyed, the state shown in FIG.
Further, as shown in FIG. 10, the boundary portion between the base linear portion 25 and the base curved portion 26 on the leading side of the base 2 of the pallet 1 has a linear shape in the curved portion of the feed belt 5 (the linear guide surface 6 in the figure).
7) and the curved shape (curved guide surface 38 in the figure) are reached. At the position before reaching the boundary portion, the pallet 1 is guided by the linear guide surface 67 and the linear guide portion 7 as in FIG. When the pallet 1 further advances
Then, the state shown in FIG. 12 is reached, and the boundary portion between the base straight portion 25 and the base curved portion 26 is located at a position where the boundary portion of the curved portion has passed. At this position, the boundary portion between the base linear portion 25 and the base curved portion 26 on the leading side of the pallet 1 has the linear guide surface 6
7 and slides on the curved guide surface 68, and the base linear portion 25 on the rear side of the pallet 1 comes to a position separated from the linear guide surface 67.

In FIG. 7, the linear body portions 25 on the front and rear sides of the pallet 1 are separated from the curved guide surface 68, the curved body portion 26 slides on the curved guide surface 68, and the pallet 1 is curved guide surface 68. Will be guided to. This is because the distance from the center of the feed belt timing pulley 52 of the pallet 1 is determined by the base curved portion 26 of the base 2 of the pallet 1, and the curvature of the base curved portion 26 is the same as that of the curved guide surface 68 of the guide portion. Since the pallet 1 is formed to have a curvature of, the pallet 1 moves widely in contact with the curved guide surface 68 while the pallet 1 passes through the curved guide portion 6. Therefore, the pallet 1 does not vibrate at the curved portion and can be smoothly transported even at high speed.

The action of the guide portion will be examined, for example, in the case where the pallet 1 passes through the curved portion in a structure in which the guide portion is not formed in the curved portion and the substrate curved portion 26 is not formed in the base body 2. In this case, the base 2 of the pallet 1 is displaced from the mounting position of the pallet 1 because the distance between the base 2 of the pallet 1 and the timing pulley 52 for the feed belt is defined at one point of the mounting position of the belt mounting member 27. At the position, the distance from the feed belt 5 is not constant and vibration occurs. In the first embodiment, the curved guide surface 6 of the guide portion and the curved portion of the pallet 1 work together to keep the distance between the pallet 1 and the curved portion constant and reduce vibration. .

(Second Embodiment) A second embodiment of the pallet conveyor according to the present invention will be described with reference to FIGS. 13 to 15. In the second embodiment, the curved guide portion of the guide portion is a curved guide surface that guides the pallet from the outside of the curved portion, and the guided portion on the pallet side is a sliding surface having the same curvature as the curved guide surface. The pallet is guided from the outside of the curved portion in the direction of the feed belt. The other configurations are similar to those of the first embodiment, and thus the description thereof is omitted.

The structure on the pallet 1 side is such that both legs (first leg 123, second leg 1) of the base body 102 constituting the pallet 1 are arranged.
Part of 24) is laterally projected, and a straight base portion 125 and a curved base portion 126 are formed on the upper surface of the projected portion. The base curved portion 126 is formed at both ends of the base 102, and the base straight portion 125 is formed between both base curved portions 126. The curvature of the base curved portion 126 is the curvature guide portion 6 shown in FIG.
The curvature of the curved guide surface 168 is the same as that of the curved guide surface 168, and the base curved portion 126 moves while sliding on the curved guide surface 168 while being guided by the guide surface.

Until the pallet 1 reaches the curved portion, the linear guide portion 7 (the second linear guide portion 172 in the figure) supports the protruding portion of the base 2 from the inside of the curve. When the pallet 1 reaches the curved portion, the curved guide portion 6 first guides the base linear portion 125 from the outside of the curved portion by the linear guide surface 167, and when the conveyance further proceeds, the curved guide surface 168 causes the curved guide surface 168 to bend. Is guided from the outside of the curved portion to guide the pallet 1 at the curved portion.

FIG. 15 shows the state of the pallet 1 at the bending portion, and the base bending portion 126 has the bending guide surface 168.
It is transported by the feed belt 5 while sliding. It should be noted that, similarly to the above-described embodiment, the third bending guide portion 63 and the fourth bending guide portion 63
A bending guide similar to the bending guide 64 is used as the base bending portion 126.
It may be provided on the outer side of the pallet to prevent the pallet from being shaken in the lateral direction.

The distance from the center of the feed belt timing pulley 52 of the pallet 1 is determined by the base curved portion 126 of the base 2 of the pallet 1, and the curvature of the base curved portion 26 is formed to be the same as the curved guide surface 168 of the guide portion. Therefore, while the pallet 1 passes through the curved guide portion 6, the pallet 1 moves along the curved guide surface 168 without being separated. Therefore, the pallet 1 does not vibrate at the curved portion and is smoothly transported. In the second embodiment, the curved guide surface of the guide portion and the curved portion of the pallet work together to keep the distance between the pallet and the curved portion constant and reduce vibration.

(Third Embodiment) A third embodiment of the pallet conveyor according to the present invention will be described with reference to FIGS. In the third embodiment, the curved guide portion of the guide portion is a guide groove having a shape on the side of the annular feed belt and along the path of the feed belt, and is provided in the guided portion on the pallet side in the guide groove. The pallet is provided with a protrusion to be fitted therein, and guides the pallet from the side. The other structure is the same as that of the first embodiment, and the description thereof is omitted.

The structure on the pallet 1 side is such that both legs (first leg 223, second leg 2) of the base body 202 constituting the pallet 1 are arranged.
24) laterally projecting from the projection (first projection 22)
5, a second protrusion 226) is formed. This protruding portion is loosely fitted in a guide groove formed in the curved guide portion 6 and guided while sliding.

The curved guide portion 6 can be composed of a curved portion and a straight portion, and the curved portion has a first curved guide portion 261 having a curved guide groove 268 formed in a shape along the path of the feed belt. And a second curved guide portion 262,
Further, the straight line portion has a curved guide groove 268 and is arranged adjacent to the first curved guide portion 261 and the second curved guide portion 262. Then, the bending guide portions 6 are arranged to face each other with the feed belt 5 and the feed belt gear interposed therebetween. Although the curved guide portion and the linear guide portion are shown separately in FIG. 17, they may be integrally formed.

Until the pallet 1 reaches the curved portion, the linear guide portion can support the base body 2 as in the above embodiment. When the pallet 1 reaches the curved portion, the curved guide portion 6 first loosely fits the first protruding portion 225 and the second protruding portion 226 in the linear guide groove 267, and the linear guide groove 2
Follow along 67. Further, as the conveyance of the pallet 1 proceeds, the first protrusion 225 and the second protrusion 226 are loosely fitted in the curved guide groove 268, and guidance is performed along the curved guide groove 268.

FIG. 18 shows the state of the pallet 1 in the curved portion, and the protrusion on the pallet 1 side is along the curved guide groove 268 formed in the first curved guide portion 261 and the second curved guide portion 262. It is conveyed by the feed belt 5 while sliding on the surface. The distance from the center of the feed belt timing pulley 52 of the pallet 1 is determined by the projecting portions 225 and 226 of the base 2 of the pallet 1, and this projecting portion moves along the curved guide surface 168 of the guide portion.
The pallet 1 moves along the curved guide surface 168 without separating while the sheet passes through the curved guide portion 6. Therefore, the pallet 1 does not vibrate at the curved portion and is smoothly transported. In the third embodiment, by virtue of the synergistic action of the curved guide groove of the guide portion and the projecting portion of the pallet, the distance between the pallet and the curved portion is kept constant to reduce vibration.

(Fourth Embodiment) A fourth embodiment of the pallet carrying device according to the present invention will be described with reference to FIGS. 19 and 20. In the fourth embodiment, the curved guide portion of the guide portion is used as the outer peripheral surface of the feed belt, and a groove portion having the same curvature as the curvature of the outer peripheral surface of the feed belt in the curved portion is formed inside the pallet and is fed into the groove portion. The belt is positioned and guided. The other structure is the same as that of the first embodiment, and the description thereof is omitted.

The structure on the pallet 1 side is such that both legs (first leg 323, second leg 3) of the base 302 constituting the pallet 1 are arranged.
24), and forms a portion where the feed belt is mounted between the both leg portions, and the groove portion 326 is formed in this passage portion.
Is provided, and the curved feed belt is positioned in the groove to prevent the feed belt from coming into contact with the base 302 due to the curvature of the feed belt, and to convey the pallet 1 along the feed belt.

Groove portion 326 formed inside substrate 302
Edge portions 325 are formed at both ends of the feed belt, and the feed belt is urged toward the groove portion 326 by spring members attached to the base body 302. When the pallet (upper side in FIG. 19) moves along a linear transport path, the pallet 1 is attached to the edge 3
The pallet 1 is stabilized by bringing 25 and the linear portion following the edge into contact with the upper surface of the feed belt 5. Further, when the pallet moves on the curved transport path, the pallet 1 stabilizes the pallet 1 by bringing the edge portion 325 into contact with the upper surface of the feed belt 5. At this time, the feed belt 5 is attracted into the groove portion 326 by the spring member and curved toward the pallet 1 side, but the feed belt 5 and the substrate 302 do not come into contact with each other due to the groove portion 326 formed inside the base body 302. , Is stably guided while being supported on the upper surface of the feed belt 5.

FIG. 20 is a diagram showing linear conveyance and curved conveyance of the pallet 1, showing a state of the linear portion before reaching the curved portion by (a), and showing a boundary position A between the linear portion and the curved portion. (B) shows the state in (1), and (c) shows the state in the curved portion.

(A) In the state of the feed belt (b), the pallet 1 is conveyed with its edge 325 and the linear portion following the edge 325 in contact with the upper surface of the feed belt 5, and the contact is made. The portion makes the pallet 1 stable with respect to the feed belt 5 in the traveling direction of the feed belt 5. Further, in the state of (c), the pallet 1 is conveyed with its edge 325 in contact with the curved surface of the feed belt 5, and the pallet 1 is fed to the feed belt 5 by the contact portion. Is stable with respect to the traveling direction of. At this time, the feed belt 5 is curved in the direction of the mounting plate 3 by the spring member in the central portion of the base 302, but presses the base 302 because the groove 326 is formed in the corresponding base 302. There is no such thing.

The distance from the center of the feed belt timing pulley 52 of the pallet 1 is determined by the edge portion 325 of the base 2 of the pallet 1, and this edge portion 325 moves while being in contact with the feed belt 5, so that the pallet 1 is curved. Guide 6
The pallet 1 moves along the feed belt 5 without passing through while passing through. Therefore, the pallet 1 does not vibrate at the curved portion and is smoothly transported. In the fourth embodiment, a part of the pallet side and the feed belt cooperate with each other to keep the distance between the pallet and the curved portion constant and reduce the vibration.

[0052]

As described above, according to the present invention,
In a fixed-flow type pallet conveyor, vertical vibration of the pallet is suppressed when the pallet passes through the curved path at the corner of the conveyor, and the pallet does not generate noise and enables smooth pallet transfer. it can.

[Brief description of drawings]

FIG. 1 is an exploded perspective view illustrating a configuration of a guide unit according to a first embodiment.

FIG. 2 is a schematic diagram showing the overall configuration of a pallet transport device of the present invention.

FIG. 3 is an exploded perspective view illustrating the configuration of a pallet according to the first embodiment.

FIG. 4 is an exploded perspective view illustrating the configuration of the pallet according to the first embodiment.

5A is a sectional front view showing the structure of a guide portion in the first embodiment, and FIG. 5B is a plan view.

FIG. 6 is a perspective view showing a state at the time of entering a curved portion of a pallet in the first embodiment.

FIG. 7 is a perspective view showing a state in a curved portion of a pallet in the first embodiment.

FIG. 8 is an operation diagram illustrating movement of the pallet according to the first embodiment.

FIG. 9 is an operation diagram for explaining the movement of the pallet according to the first embodiment and shows the next stage of FIG.

FIG. 10 is an operation diagram for explaining the movement of the pallet according to the first embodiment and shows the next stage of FIG.

FIG. 11 is an operation diagram for explaining the movement of the pallet according to the first embodiment and shows the next stage of FIG.

FIG. 12 is a motion diagram for explaining the movement of the pallet according to the first embodiment, and shows a step subsequent to 11.

FIG. 13 is a perspective view illustrating the configuration of the second embodiment.

FIG. 14 is a perspective view illustrating the operation of the second embodiment.

15 is a perspective view for explaining the operation of the second embodiment, and FIG.
5 shows the next stage.

FIG. 16 is a perspective view illustrating the configuration of the third embodiment.

FIG. 17 is a perspective view illustrating the operation of the third embodiment.

FIG. 18 is a perspective view for explaining the operation of the third embodiment, and FIG.
7 shows the next stage.

FIG. 19 is an exploded perspective view illustrating the configuration of the fourth embodiment.

FIG. 20 is a diagram for explaining the operation of the fourth embodiment.

[Explanation of symbols]

1 Pallet 2 Base 23, 24, 123, 124, 223, 224, 32
3,324 First and second leg parts 25,125 Base body straight part 26,126 Base body curved part 225,226 First and second protruding parts 325 Edge part 326 Groove part 3 Mounting plate 5 Feed belt 52 Timing pulley 6 Curved guide part 61 -64,162,261,262 Curved guide part 67,167,267 Linear guide surface 68,168,268 Curved guide surface 7 Linear guide part 71,72,172 1st, 2nd linear guide part

Claims (9)

[Claims] 1. A pallet transporting device for mounting a pallet on an endless feed belt, and placing and transporting a transported object on the pallet, the pallet transporting device having a curved shape corresponding to a curved shape of a curved portion of a transport path of the feed belt. A guide part having a guide part and a guided part formed in a part of the pallet and having a shape corresponding to the guide part, and sliding the corresponding shaped parts of the guided part and the guide part. To guide the guided part along the guide part,
A pallet transport device characterized by moving a pallet along a transport path of a feed belt. 2. The curved guide portion of the guide portion includes a curved portion that follows the path of the feed belt, guides the pallet from below, and has a linear portion that is continuously adjacent to the curved portion. The pallet transport device according to claim 3, wherein 3. The curved portion is a curved guide surface that slides on a part of the pallet to guide the movement of the pallet.
The pallet transfer device described. 4. The guided portion on the pallet side has a sliding surface having the same curvature as that of the curved guiding surface.
The pallet transfer device described. 5. The guide portion in the straight portion of the conveying path of the feed belt is provided in the straight portion of the conveying path of the feed belt, and is adjacent to the straight guide portion in the curved portion of the convey path of the feed belt. The pallet transport device according to claim 1. 6. The pallet conveying device according to claim 2, wherein the curved guide portion of the guide portion is provided with support surfaces sandwiching both side surfaces of the pallet in the curved portion of the conveying path of the feed belt. 7. The curved guide portion of the guide portion has a shape along the path of the feed belt and has a curved guide surface for guiding the pallet from above, and the guided portion on the pallet side has a curvature of the curved guide surface. The pallet conveyor according to claim 1, wherein the pallet conveyor has the same sliding surface. 8. The curved guide portion of the guide portion is provided with a guide groove on the side of the annular feed belt and along the path of the feed belt, and the guided portion on the pallet side is fitted in the guide groove. The pallet conveyor according to claim 1, further comprising a protruding portion. 9. The curved guide portion of the guide portion is the outer peripheral surface of the feed belt, and the pallet is provided with a groove portion having the same curvature as the curvature of the outer peripheral surface of the feed belt in the curved portion, and the feed belt is positioned in the groove portion. The pallet transport device according to claim 1, wherein: