JPH0535045Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention relates to a belt conveyor for transporting packaged articles made of, for example, two-folded synthetic resin films, and more particularly to a belt conveyor in which the length of an endless belt is improved so that it can be extended and contracted.

[Conventional technology]

2. Description of the Related Art As a conveyance device for sealing an article packaging film during the article transfer process, one is already known in which an article supply side conveyor and an article discharge side conveyor are arranged in the longitudinal direction, and a sealing device is arranged between these conveyors. In the case of such a conveyance device, a gap is created between the conveyors by the sealing device, so if the conveyor is left as it is, the transferred articles will fall through the gap. Therefore, after sealing the packaging film of the transported goods,
Either one of the article supply side conveyor and the article discharge side conveyor is moved close to the other conveyor to eliminate the gap between them as much as possible, and to prevent the transferred article from falling through the gap, and to prevent the subsequent transferred article from falling through the gap. During sealing, the conveyors are separated from each other to enable operation of the sealing device. However, in the past, one conveyor was moved in its entirety to approach or separate from the other conveyor, which resulted in a complex and large-scale structure for the conveyor support means, transfer adjustment means, etc., and required a large installation space. This will inevitably lead to increased costs. In particular, when moving the entire conveyor as described above, there is a limit to how ideally the gap can be made small due to the difficulty of conveying the conveyor, and as a result, the transferred items may get caught in the gap or fall. Something happened.

[Problem that the invention attempts to solve]

This idea was developed as a result of intensive research in view of the above circumstances.
This is a new invention that allows the endless belt itself to be adjusted in length to suit the purpose of use without moving the entire conveyor, allowing it to be placed adjacent to another belt conveyor. To provide a belt conveyor which can arbitrarily and ideally adjust the gap with the conveyor, reliably prevent the transferred articles from falling from the gap, and always perform smooth article transfer.

[Means to solve the problem]

In order to achieve this problem, this invention arranges a belt conveyor on the supply side and a belt conveyor on the discharge side with a gap between them before and after the conveyance direction of the packaged articles, and a sealing device is installed in the gap between the belt conveyors. In this belt conveyor, one of the supply side belt conveyor and the discharge side belt conveyor is driven in circulation at a fixed position, and the tip of the other belt conveyor is The belt conveyor is capable of extending and contracting so as to approach or move away from one of the belt conveyors, and has the following configuration. A fixed point belt drive roller and a fixed point belt idler are spaced apart in the transport direction. A roller support whose one longitudinal end side overlaps in the direction along the fixed point belt drive roller and the fixed point belt idler is disposed so as to be movable in the transport direction. A pair of moving point belt idlers are each pivotally supported at both ends of the roller support. Between the fixed point belt drive roller and the moving point belt idler at the tip of the roller support, and from the moving point belt idler at the tip to the fixed point belt driving roller via the moving point belt idler at the rear end of the roller support and the fixed point belt idler. The endless belt is wound around the belt, and the endless belt is made to meander between a moving point belt idler and a fixed point belt idler at the rear end of the roller support. A belt drive means for rotationally driving the fixed point belt drive roller is provided. The roller support is provided so as to be able to slide approximately horizontally back and forth on a fixed member fixed to a base that supports the belt conveyor, and one of the fluid pressure cylinders is connected to the fixed member, and the other is connected to the fixed member. The endless belt is connected to a roller support body and moves the roller support body in a reciprocating straight line, thereby expanding and contracting the endless belt. This is a technical measure taken.

[Effect]

As a result, when the belt drive means is activated,
As the roller support moves forward or backward, the endless belt is extended or shortened in the direction of movement with the fixed point belt drive roller as a base point. For this reason, it is possible to ideally and easily approach or separate from another conveyor, for example, by simply expanding and contracting the endless belt without moving the entire conveyor as in the past, and transfer from the gap between the conveyor and the conveyor. It can prevent items from falling.

【Example】

An embodiment of this invention will be described below based on the drawings. In FIGS. 1 and 2, 1 is a belt conveyor on the article supply side, 2 is a belt conveyor on the article discharge side arranged in the front end side extension direction of the belt conveyor 1 on the article supply side, and 3 is a link between the belt conveyors 1 and 2. The sealer 4 is located below the sealer 3, and the sealer 3 and the sealer holder 4 are moved up and down in relative directions. The belt conveyor 2 on the article discharge side has a large-diameter fixed-point belt drive roller 5 pivotally supported on the conveyance terminal side.
and a fixed point belt idler 6 spaced apart from the front lower part. At the front separated position of the fixed point belt drive roller 5,
A roller support 7 is movably disposed at a spaced position above the fixed-point belt idler 6 and extends along the transport direction between the fixed-point belt idler 6 and the fixed-point belt drive roller 5 with its rear end extending in an overlapping state. . As shown in detail in FIG. 3, the roller support body 7 in the illustrated example includes a distal end roller bearing portion 8 in an uneven parallel shape, and
It has a slide rail 9 whose front end is integrally connected to the tip roller bearing portion 8. The slide rail 9 is movably supported in the transport direction via runners 12 and 13 on fixed support bars 10 and 11 arranged at front and rear separated positions. In the illustrated example, the slide rail 9 is made of a channel member and has rounded grooves 9a and 9b extending in the longitudinal direction on both sides. Meanwhile, runner 1
2 and 13 are a pair of left and right elliptical raceway grooves 12, respectively.
a, 12b, and a large number of steel balls 12c, 12b that are loosely fitted into these grooves with their spherical surfaces partially protruding outward so that they can roll freely, and that circulate within the respective grooves.
It consists of a flat linear bearing with Then, the round grooves 9a, 9 of the slide rail 9
b are slidably fitted into and engaged with the outwardly protruding spherical portions of the steel balls 12c, 12b, thereby allowing the slide rail 9 to slide smoothly. In the roller support 7, a front moving point belt idler 14 is pivotally supported on the tip roller bearing portion 8, and a rear moving point belt idler 15 is supported on the rear end of the slide rail 9. In the above, between the fixed point belt drive roller 5 and the front moving point belt idler 14, the front moving point belt idler 14 and the rear moving point belt idler 15
An endless belt 16 is wound between the rear moving point belt idler 15 and the fixed point belt idler 6, and between the fixed point belt idler 6 and the fixed point belt drive roller 5, respectively. Therefore, this endless belt 16 is wound in a meandering manner between the rear end moving point belt idler 15 and the fixed point belt idler 6. The fixed point belt drive roller 5 is rotatably driven by a belt drive means 17, and the belt drive means 17 in the illustrated example comprises a transmission motor. On the other hand, the roller support 7 is connected to the belt telescopic drive means 1.
8 to be driven in the transport direction. The belt extension/contraction drive means 18 in the illustrated example is a cylinder 18a fixedly held on the fixed support bars 10, 11.
and a cylinder rod 18b whose tip end is connected to the hanging bracket 8a of the tip roller bearing section 8. Here, the belt drive means 17, the belt extension/contraction drive means 18, and the sealer 3 and sealer pedestal 4 are arranged to be controlled intermittently in sequence. That is, the sequence control is such that when the sealer 3 and the sealer pedestal 4 are separated from each other in the relative direction, the belt expansion/contraction driving means 18 is activated in the direction of extension of the endless belt 16 to move the article supply side belt conveyor 2 to the article supply side belt conveyor. 1, signal control to start the belt driving means 17 after that, and transfer of the packaged article B from the article supply belt conveyor 1 to the transfer start end side of the article supply belt conveyor 2 are not shown. The position sensor detects,
After stopping the fixed point belt drive roller 5 based on the detection signal, the belt extension/contraction drive means 18 is moved to the endless belt 1.
6. It consists of signal control to start in the shortening direction, and signal control to raise the sealer pedestal 4 and lower the sealer 3 after stopping. Next, the operation of the above embodiment will be explained. As shown in FIG. 2, when the transfer start end of the article supply belt conveyor 2 approaches the transfer end side of the article supply belt conveyor 1 and the endless belt 16 is driven to rotate, there is almost no gap between the conveyors. Therefore, the packaged article B is smoothly transferred from the article supply side belt conveyor 1 to the transfer start end side of the article supply side belt conveyor 2. At approximately the same time as this transfer, the endless belt 16 is stopped, and then the belt extension/contraction driving means 18 is started in the direction of shortening the endless belt 16, so that the transfer start end side of the endless belt 16 is moved to the article supply side belt as shown in FIG. It stops when the part to be sealed on the packaging film F of the packaged article B is spaced apart from the conveyor 1 and located between the sealer 3 and the sealer holder 4. After the stop, the sealer pedestal 4 is raised and the sealer 3 is driven downward, so that the sealer 3
The sealed portion of the packaging film F is fused and sealed. After this sealing, the sealer 3 is driven upward, the sealer pedestal 4 is driven downward, and then the endless belt 16 is driven and rotated, and the belt extension/contraction driving means 18 is activated in the direction in which the endless belt 16 extends. The transfer start end side of the endless belt 16 moves close to the article supply side belt conveyor 1, returns to the state shown in FIG. 2, and receives the subsequent packaged article B from the article supply side belt conveyor 1. By sequentially and intermittently repeating the above operations, the transferred packaged articles B from the article supply side belt conveyor 1 are sequentially and intermittently transferred to the article supply side belt conveyor 2, and the packaging film F of the transferred packaged articles B is sealed. The sealed packaged articles B are sequentially conveyed by the article supply side belt conveyor 2. In the above embodiments, the case of transporting the packaged articles and sealing them during the transport process has been described, but it goes without saying that the belt conveyor of this invention can be used for other purposes.

[Effect of the idea]

As described above, according to this invention, since the endless belt can be adjusted to expand and contract in the transport direction, there is no need to move the entire conveyor as in the conventional case. Moreover, it is possible to easily eliminate the gap between the conveyor and the conveyor, so that when the packaged article is received from the other conveyor and transferred, the packaged article, etc. does not fall through the gap. This has the advantage that the transfer can be carried out smoothly. In addition, a slider that reciprocates with a fluid pressure cylinder is provided to extend and contract the endless belt so that it can move horizontally, so that stable extension and contraction can be performed with a simple structure.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of a belt conveyor according to a preferred embodiment of the invention, FIG. 2 is an explanatory view of its operation, and FIG. 3 is a partially enlarged perspective view of the main parts. 5...Fixed point belt drive roller, 6...Fixed point belt idler, 7...Roller support, 14, 15...
... Moving point belt idler, 16 ... Endless belt, 1
7... Belt drive means, 18... Belt expansion/contraction drive means.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A belt conveyor on the supply side and a belt conveyor on the discharge side are arranged with a gap in front and back in the conveying direction of the packaged articles, and a sealing device is installed in the gap between the belt conveyors. In addition to arranging fusing and welding parts, one of the belt conveyors on the supply side and the belt conveyor on the discharge side is driven to circulate in a fixed position, and the tip of the other belt conveyor is connected to one of the belts. In a belt conveyor that is telescopically movable so as to approach or move away from the conveyor, the telescopically movable belt conveyor has fixed-point belt drive rollers and fixed-point belt idlers that are spaced apart in the transport direction, and these fixed-point belt drive rollers. and a fixed point belt idler, a roller support body arranged so as to be movable in the transport direction with one longitudinal end side overlapping in the direction along the direction, and a pair of moving point belt idlers pivotally supported at both ends of the roller support body. , Wound between the fixed point belt drive roller and a moving point belt idler at the tip of the roller support to form an article movement path, and from the moving point belt idler at the tip to the moving point belt at the base end of the roller support. An endless belt winding in a meandering manner between an idler and the fixed point belt idler to reach a fixed point belt driving roller, and a belt driving means for rotationally driving the fixed point belt driving roller, the roller support body being a belt conveyor. The hydraulic cylinder is provided so as to be able to slide approximately horizontally back and forth on a fixed member fixed to a base supporting the roller. A belt conveyor characterized by moving a support body back and forth in a straight line and expanding and contracting an endless belt. (2) The scope of the utility model registration claim, which is characterized in that the belt conveyor on the discharge side is driven in a fixed position, and the belt conveyor on the supply side can be moved telescopically so that its tip approaches the belt conveyor on the discharge side. The belt conveyor according to item 1.