JP2008037582A - Slide extensible roller conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a slide extensible roller conveyor simplified in structure, manufacturable at low cost, easily extended/retracted, and increased in retraction length as the roller conveyor in an extended state is longer. <P>SOLUTION: A roller conveyor 1<SB>-1</SB>comprises a guide rail 5, a movable guide 6, a slide guide, and a supporter. A guide frame 9 is installed on the left and right frames 3 of a roller conveyor 1<SB>-2</SB>. The movable guide 6 is connected to the front end of the frame of the roller conveyor 1<SB>-2</SB>through a link 10. When the link 10 is erected, the roller conveyor 1<SB>-2</SB>is raised to the upper side of the roller conveyor 1<SB>-2</SB>and to the height position to which the guide frame 9 is guided by the slide guide. In this state, the roller conveyor 1<SB>-2</SB>is slid to the upper side of the roller conveyor 1-<SB>1</SB>to shorten the overall length of the conveyor. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a slide expansion / contraction roller conveyor that can be expanded and contracted and can be greatly shortened when not in use, can be easily expanded and contracted, and has a simple structure and can be provided at low cost.

  For example, at a truck terminal serving as a distribution base, a roller conveyor for unloading is frequently used. This roller conveyor includes a stationary type and a portable type that can be used by placing it at a required place when necessary.

  A portable roller conveyor is used by connecting a plurality of rollers when the length of the conveyance path is increased. In particular, when the roller conveyor is a fixed roller conveyor having a constant length, a plurality of rollers are used. It is not easy to carry the conveyor out of the storage location and place it in sequence while connecting it to the required location, or to detach the multiple roller conveyors and return them to the original storage location after use. Work time also becomes longer.

  In addition, when the roller conveyor is a legged conveyor, it cannot be stacked and stored, requiring a large storage space.

The storage space problem can be solved by using an extendable roller conveyor that can be shortened in length. The telescopic roller conveyor is disclosed in Patent Documents 1 to 3 listed below.
JP-A-7-144729 Japanese Patent Laid-Open No. 9-328217 JP 2003-63632 A

  The roller conveyors disclosed in the above-mentioned Patent Documents 1 and 2 are configured with link chains on the left and right frames that support both ends of the rollers. The link chain is turned on one end side of the conveyor, By increasing or decreasing, the conveyor is expanded or contracted in the length direction. This complicates the structure and increases the cost. It is also conceivable that when a frame constituted by a link chain is extended, the frame is loosened and the flow of the conveyed product on the conveying surface deteriorates.

  In addition, the roller conveyor disclosed in Patent Document 3 uses a pantograph-structured frame composed of parallel links, and has a structure in which the length of the frame is changed to expand and contract the conveyor. Complex and expensive.

  Although it is far more advantageous in terms of cost to connect and use the required number of standard roller conveyors than to use a complicated roller conveyor as disclosed in Patent Documents 1 to 3, If used, as described above, the burden on the worker for the placement and withdrawal increases, and the working time also becomes longer. In addition, the storage space of the conveyor when not in use is undesirably increased.

  The present invention has been made in view of these points, and is a slide that is simple, inexpensive, easy to expand and contract, and can increase the amount of contraction of the length as the length during expansion increases. An object is to realize and provide an extendable roller conveyor.

In order to solve the above-described problems, in the present invention, n (n ≧ 2) provided with rollers each arranged at a constant pitch in the length direction and left and right frames of a fixed size that support the rollers on both sides. The roller conveyors of the bases are connected in the order of numbers to constitute an extendable roller conveyor.
Specifically, guide rails extending substantially along the entire length of the left and right frames along the side surfaces of the left and right frames, with the nth roller conveyor as the last part. And a movable guide guided by each guide rail, a slide guide attached to a side surface near the rear ends of the left and right frames, and a receptacle projecting rearward from the left and right frames.
In addition, a guide frame guided by the slide guide provided on the one-numbered roller conveyor is provided below the left and right frames of each roller conveyor except for No. 1. Further, No. 1 to (n−1) Each of the movable guides provided on each of the roller conveyors up to and including the front end of the left and right frames of the old roller conveyor is pivotally connected at one end to the left and right frames and the other end to the movable guide. Connected through a link.
In this way, the link is positioned above the young roller conveyor when it is erected by rotating the pivot guide with respect to the left and right frames of the movable guide and the old roller conveyor around the fulcrum, and The old roller conveyor is lifted to a position where the old roller conveyor guide frame is guided by the slide guide of the young roller conveyor. It is possible to reduce the overall length of the conveyor by sliding it to the upper side of the roller conveyor, and when the link is lowered toward the roller conveyor side of the old roller at the moving guide end point of the movable guide. The number one roller conveyor is supported by the receiving member of the number one roller conveyor and connected to the rear of the number one roller conveyor.

  In this slide extendable roller conveyor, it is preferable that the link is provided with a handle for raising and lowering the link and a lock mechanism for holding the link upright. It is also preferable to provide a leg on each roller conveyor. It is preferable that the height of the rear leg is higher. When such a leg is provided, each roller conveyor can be inclined so that the tip side of the first roller conveyor is lowered. The leg is preferably a wheeled leg.

  In addition, the connecting end side of the link to the frame of the old roller conveyor is connected by a single shaft that also serves as a pivot shaft, and the shaft is supported by a receiving member at the rear of the young roller conveyor. It is also preferable to do so.

  The slide telescopic roller conveyor of the present invention is configured by connecting a plurality of fixed-size roller conveyors advantageous in terms of cost, and stacking one old roller conveyor on a young roller conveyor to reduce the length, The structure is simple and the cost can be reduced.

  In addition, when the link provided between the left and right movable guides of the young roller conveyor and the frame of the old roller conveyor is raised, the old roller conveyor is lifted above the young roller conveyor. In this state, while the guide frame is guided by the slide guide, the movable guide can be moved along the guide rail to easily slide the old roller conveyor, thus simplifying the operation of shortening the length of the conveyor. Can be done. Also, slide the old roller conveyor in the direction to extend the conveyor length, and at the end of the movable guide, tilt the link toward the old roller conveyor side. Since it is supported by the conveyor support and connected to the rear of the one-numbered roller conveyor, one-numbered roller conveyor is stretched while extending the number 2 to n (number 2 when n = 2). It is also easy to connect to the rear of the machine, the burden on the operator is reduced, and the operator can perform expansion and contraction and connection alone.

  In addition, as the number of roller conveyors to be combined increases, the expansion / contraction ratio (length during expansion / length during contraction) can be set larger, and the storage space can be further reduced by increasing the amount of contraction of the length. It becomes possible.

  In addition, what provided the handle which performs the raising / lowering operation | movement of the said link can perform raising / lowering of the old number side conveyor by raising / lowering a link easily. Also, with a lock mechanism that keeps the link upright, it is possible to prevent the old roller conveyor from riding on the younger roller conveyor and to perform stable conveyor sliding during expansion and contraction. it can.

  Moreover, what provided the leg from which height differs in each roller conveyor can attach an inclination to each roller conveyor, and can improve the flow of a conveyed product. Moreover, what provided the wheel in the leg can make an operator move the conveyor which shortened length easily alone. The conveyor slide during expansion and contraction is also smoothed with the front part of the conveyor supported by the movable guide and the rear part supported by the legs with wheels.

  In addition, if the link is connected to the frame by a shaft that also serves as a pivot shaft, the shaft can be supported by a receiving member at the rear of one roller conveyor and the connection between the conveyors can be stabilized.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 8 of the accompanying drawings. 1 to 7 show a first embodiment. As shown in FIGS. 1 and 2, the telescoping roller conveyor 20 of the first embodiment is configured by combining two roller conveyors 1 _-1 and 1 _-2 constant width. _-1 and _-2 added to the reference numeral 1 represent the ranks of the two conveyors combined. In the present invention, a conveyor having a small number representing the rank is considered a young conveyor, and a conveyor having a large number is considered an old conveyor.

Here, the roller conveyor 1 _-2 is connected to the rear of the roller conveyor 1 _-1. Roller conveyor 1 _-1, 1 _-2, those with a roller 2 that are each disposed at a constant pitch in the longitudinal direction and the frame 3, 3 of the right and left standard dimension length for supporting the rollers 2 on both sides Is used.
The roller conveyor 1 _-1 have respective legs 4 in front and rear, roller conveyor 1 _-2, which is used having a leg 4 only in the rear.

The leg 4 may be one without wheels, but here, a leg with wheels 4a that facilitates moving the conveyor is employed. The wheel 4a may be a commercially available free caster with a brake. Legs 4 of each conveyor roller conveyor 1 _-1 by increasing the height as those in the back _side, to 1 _-2, although the front end side of the roller conveyor 1 _-1 are causing lower slope, the user A leg with a constant height or a leg that can be adjusted in height may be provided in accordance with the request. The illustrated leg 4 can be adjusted in height stepwise.

On the front side of the roller conveyor 1 _-1, guide rails 5, 5 extending substantially over the frame the entire length in the longitudinal direction along the sides of the left and right frames 3, 3 are provided. The illustrated guide rails 5 and 5 are formed of C-shaped steel, and the C-shaped steel is attached to the side surfaces of the frames 3 and 3 in a lateral direction.

  The guide rails 5 and 5 are provided with movable guides 6 that are guided by the grooves of the respective guide rails and move in the grooves. The movable guide 6 is preferably one in which a plurality of guide rollers 6a are connected by a frame 6b as shown in FIG. 5, but a sliding body with improved sliding property is also conceivable. A front end and a rear end of the guide rails 5 and 5 are provided with a movement end, and the movable guide 6 is allowed to move within a range restricted by the movement end.

The rear end vicinity of the side surface of the left and right frames 3, 3 of the roller conveyor 1 _-1, 5, the slide guide 7 shown in FIG. 6 are attached. The slide guide 7 uses a vertically arranged roller, but a commercially available ball caster or the like can also be used.

At the rear of the left and right frames of the roller conveyor 1 _-1, 5, and receptacle 8 shown in FIG. 7 are provided to protrude rearward. The illustrated receiving tool 8 has a groove 8a, but this groove 8a is not essential.

The roller conveyor 1 _-2, the lower part of the left and right frames 3, 3, the guide frame 9 to be guided by the slide guide 7 provided in the roller conveyor 1 _-1 are provided to droop. Guide frame 9, the vicinity of the rear end of the roller conveyor 1 _-2 toward the front and extends in the longitudinal direction. The guide frame 9, in order not to interfere with the roller conveyor 1 _-1 to lift the roller conveyor 1 _-2, the front end of the left and right frames 3, 3 is not allowed to reach.

The front end of the frame 3, 3 of the right and left of each movable guide 6 and the roller conveyor 1 _-2 disposed on both sides of the roller conveyor 1 _-1 is connected via a link 10. Left and right links 10 and 10 of the pair has one end to the frame 3, 3 of the right and left roller conveyor 1 _-2, the other end is respectively pivotally connected to the frame 6b of the right and left movable guide 6 (Fig. 5, FIG. P1 and P2 of 6 are pivot joints). One ends of the links 10 and 10 are connected by a shaft 11 that also serves as a pivot shaft for the frame 3.

  Reference numeral 12 denotes a handle attached to each link 10. The handle 12 is supported by two brackets 10a provided on the link 10 so that the handle 12 can advance and retract in the longitudinal direction of the link. The advance / retreat amount of the handle 12 is regulated within a predetermined stroke range by two stoppers 12a provided in the middle of the longitudinal direction. In addition, the frame 6 b of the movable guide 6 is provided with a locking tool 14 that forms a lock mechanism 13 in combination with the tip of the handle 12. The lock mechanism 13 holds the link 10 in an upright state, and at the position where the link 10 is erected, the distal end of the handle 12 is inserted into a hole formed in the locking tool 14 to the frame 6b of the link 10. The link 10 is prevented from rotating around the pivot coupling point to keep the link 10 standing.

Incidentally, the link 10, when operating the handle 12 is raised by rotating the pivot coupling point of both ends of the fulcrum, as shown in FIGS. 3, 5, and the upper side than the roller conveyor 1 _-1, as the roller conveyor 1 _-2 height position the roller conveyor 1 _-2 guide frame 9 in the slide guide 7 of the roller conveyor 1 _-1 is guided is lifted, its length is adjusted.

The erected link 10 maintains an upright posture by the lock mechanism 13. The state roller conveyor _{1 -1} and _{1 -2} are relatively slid longitudinally to move the roller conveyor _{1 -2} upper roller conveyor _{1 -1.} Since the distal end side of the roller conveyor 1 _-2 is supported by the movable guide 6, this task can be performed easily.
Then, at a position where the movable guide 6 has reached the moving end point of the front side of the guide rail 5, defeating the link 10 as shown in FIG. 4 by operating the handle 12 to the front side (left side in the figure), the roller conveyor 1 _{- 2} let me ride on the roller conveyor 1 _-1 completes the work of shortening the length.

When increasing the length of the conveyor, the work is performed in the reverse procedure. When the movable guide 6 reaches the rear end of the guide rail 5 and reaches the state shown in FIG. 5, the handle 12 is disengaged from the locking tool 14, and the link 10 is rotated to the rear side to be tilted. Thus, the roller conveyor 1 _-2 moved to the rear of the roller conveyor 1 _-1, are supported on the receptacle 8 fits into the groove 8a of the shaft 11 is receptacle 8. As a result, the connection is completed, and the length of the conveyor is increased to about twice that of the shortened case.
Reference numeral 16 in FIG. 1 denotes an end stopper that stops the conveyed product at the end of the conveyance path, and is provided as necessary. The end stop 16 is removable idea to freely attached is transferred to a front end of the roller conveyor 1 _-2 as the function of the stopper even when using a conveyor in a state in which reduced the length as shown in FIG. 4 Can be demonstrated.

Although the above description has been given by taking the conveyor of n = 2 as an example, the number n of combinations of the roller conveyors 1 is not limited to two. FIG. 8 shows an outline of a slide stretchable roller conveyor 20A (second embodiment) with n = 5. The conveyor is adapted to that five roller conveyor ₁₅ -1 _{to 15 -5} are connected side by side in order. Roller conveyor _{15 -1,} roller conveyor _{1 -1} the same structure of FIG. 1, the roller conveyor _{15 -5} is the same structure as the roller conveyor _{1 -2} 1. Other roller conveyor ₁₅ -2 _{to 15 -4,} the roller conveyor _{1 -2} 1, the guide rails 5 provided on the roller conveyor _{1 -1} of Figure 1, the movable guide 6, the slide guide 7 and the receptacle 8 Is added.

In each of the roller conveyors 15 _-1 to 15 _-5 , one old roller conveyor is connected to a young roller conveyor via a link 10. The structure of the connecting portion by the link 10 is the same as that in FIG.

State of the telescoping roller conveyors 20A of the second embodiment, the roller conveyor 15 _-1 state roller conveyor 15 _-2 to 15 _-5 were overlaid in this order on (5-tiered when shortened in length to the shortest )become.

  A slide expansion / contraction roller conveyor that connects three or more roller conveyors can have a larger expansion / contraction ratio (length when extended / length when shortened) than in the first embodiment. In the first embodiment, the stretchable ratio that can be set is about 2, and, for example, in the case of a conveyor having an extension length of about 6 m, the shortened length is about 3 m. On the other hand, in the second embodiment shown in FIG. 8, when the roller conveyor having the same length as that of the first embodiment is combined, the expansion ratio is set to 3 or more, and the extension length is about 15 m. The length can be reduced to about 4 m.

  The aforementioned expansion / contraction ratio can be set larger as the number of roller conveyors to be combined increases, and the effect of reducing storage space when not in use is enhanced.

Moreover, the length of the slide telescopic roller conveyor connecting three or more roller conveyors can be adjusted. For example, telescoping roller conveyor of FIG. 8 may be a transport surface is drawn out only roller conveyor 15 _-5 to shorten position constituting the two parties of the roller conveyor 15 _-4 and the roller conveyor 15 _-5. Further, the conveying surface pull the roller conveyor _{15 -5} and _{15 -4} to shorten position or constituted by three parties of the roller conveyor ₁₅ -3 _{to 15 -5,} a shortened position the roller conveyor ₁₅ -3 _{to 15 -5} drawer can be or constitute a conveying surface by 4's roller conveyor 15 _-2 to 15 _-5, utilization range is expanded increasingly freedom of usage.

Side view showing the first embodiment of the slide telescopic roller conveyor Plan view of the conveyor of FIG. The side view which shows the operation state when shortening the length of the conveyor of FIG. Side view of the conveyor in FIG. 1 with the length reduced 3 is an enlarged side view of the main part of FIG. Sectional drawing along the VV line of FIG. The enlarged side view which shows the connection part of the conveyor of FIG. Side view showing a second embodiment of the slide telescopic roller conveyor

Explanation of symbols

1 _{-1, 1 -2,} 15 -1 _{to 15 -4} roller conveyor 2 roller 3 frame 4 leg 4a wheels 5 guide rail 6 movable guide 6a guide roller 6b frame 7 slide guide 8 receptacle 8a groove 9 guide frame 10 links 10a Support bracket 11 Shaft 12 Handle 12a Stopper 13 Lock mechanism 14 Locking tool 16 End stopper

Claims (6)

N (n ≧ 2) units each comprising a roller (2) arranged at a constant pitch in the length direction and left and right frames (3, 3) of a fixed size for supporting each roller (2) on both sides Having roller conveyors ( _1-1 to 1- _n ) connected in numerical order;
Guide rails extending over the entire length of the frame along the side surfaces of the left and right frames (3, 3) on the roller conveyors No. 1 to (n-1) with the n-th roller conveyor as the last part. (5), a movable guide (6) that is guided and moved by each guide rail (5), a slide guide (7) that is attached to the side surface near the rear ends of the left and right frames (3, 3), A support (8) protruding rearward from the frame (3, 3) is provided,
The lower part of the frame (3, 3) left and right of each roller conveyor ₍₁ -2 _{to 1 -n)} except number 1, is guided by the slide guide provided on the roller conveyor one Wakaban (7) A guide frame (9) is provided,
Further, each of the movable guides (6) provided on each of the No. 1 to (n-1) No. roller conveyors and the front end portions of the left and right frames (3, 3) of the old No. 1 roller conveyor, Are connected to the left and right frames (3, 3) via a link (10) whose other end is pivotally coupled to the movable guide (6).
When the link (10) is raised by rotating the pivot joint (P1, P2) with respect to the left and right frames (3, 3) of the movable guide (6) and the left and right roller conveyor, as a fulcrum One old roller at a position above the young roller conveyor and at the height where the guide frame (9) of the old roller conveyor is guided by the slide guide (7) of the young roller conveyor The conveyor is lifted, and in this state, the old roller conveyor can be slid to the upper side of the young roller conveyor to shorten the overall length of the conveyor,
When the link (10) is tilted toward the old roller conveyor at the end of movement of the movable guide (6), the old roller conveyor is the young roller conveyor support (8). A slide telescopic roller conveyor that is supported by a roller and is connected to the rear of one young roller conveyor.   The slide telescopic roller conveyor according to claim 1, further comprising a handle (12) for performing a raising / lowering operation of the link (10).   The slide telescopic roller conveyor according to claim 1 or 2, further comprising a lock mechanism (13) for holding the link (10) in an upright state. Legs (4) are provided at the front and rear of the first roller conveyor (1 _-1 ) and the rear parts of the second and subsequent roller conveyors (1 _-2 to 1 _-n ), respectively, and the rear leg (4) The slide telescopic roller conveyor according to any one of claims 1 to 3, wherein the height of the roller conveyor is increased so that each roller conveyor is inclined such that the front end side of the first roller conveyor (1 _-1 ) is lowered.   The slide telescopic roller conveyor according to claim 4, wherein the leg (4) is a leg with wheels (4a).   The connecting end of the link (10) to the frame of the old roller conveyor is connected by a shaft (11) that also serves as a pivot shaft, and the shaft (11) is received by the rear part of the young roller conveyor. The slide telescopic roller conveyor according to any one of claims 1 to 5, which is supported by a tool (8).

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