JPS6126261Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a conveyor in which the belt or chain of the conveyor can be easily attached and detached.

A belt or chain conveyor generally includes two rollers supported at both ends of a frame, a belt stretched around the rollers, a roller drive mechanism, and the like as main components. For such conveyors, when performing mechanical maintenance inspections as well as replacing belts or chains,
It becomes necessary to remove the belt or chain. However, since the belt or chain is normally stretched between rollers under tension, removing the belt or chain is a troublesome task.

Figures 1a and 1b schematically show a conventional conveyor (here, a belt conveyor will be explained as an example). Reference numeral 1 indicates frames arranged parallel to each other on both sides. Approximately U-shaped notched grooves 11 ₁ and 11 ₂ are formed as shaft support portions, and shafts 2 ₁ and 2 ₂ for supporting rollers are supported in these notched grooves 11 ₁ and 11 ₂ . Rollers 3 ₁ , 3 ₂ are rotatably supported on the shafts 2 ₁ , 2 ₂ , and a belt 4 is disposed between the rollers 3 ₁ , 3 ₂ .
is being bridged. Further, reference numeral 5 denotes a belt tension setting section for adjusting the tension of the belt, which is composed of an L-shaped metal fitting 51 fixed to the frame 1 and an adjustment screw 52 screwed into this metal fitting 51.
The tip of the adjusting screw 52 is in contact with the shaft ₂₁ , and by tightening the adjusting screw 52, the shaft 21
₁ is pushed outward of the frame 1, that is, in the direction of the arrow X shown in the figure. Therefore, belt 4
The rollers 3 ₁ , 3 ₂ spanned by the shafts 2 ₁ , 2 ₂
, and insert the shafts 2 ₁ and 2 ₂ into the notched grooves 11 ₁ and 11 ₂ of the frame 1, and then turn the adjusting screw 52 in the tightening direction.
The shaft ₂₁ is pushed in the direction of arrow X. Then, when the belt 4 reaches an appropriate tension, the adjustment screw 52 is stopped tightening. If you do this,
The belt 4 is stretched between the rollers 3 ₁ and 3 ₂ with appropriate tension, allowing smooth conveyor operation.

By the way, in the conventional belt conveyor as described above, the belt 4 is removed by loosening the adjustment screw 52 of the belt tension setting section 5. That is, when the belt 4 is at an appropriate tension, the adjustment screws 52 provided on both sides
Loosen both to release the tension on belt 4,
Thereafter, the roller ₃₂ side is pulled outward from the frame 1 to pull out the shaft ₂₂ from the notched groove ₁₁₂ , and then the shaft ₂₁ on the roller ₃₁ side is pulled out from the notched groove ₁₁₁ . Thereby, the belt 4 can be replaced or mechanical maintenance and inspection can be performed.

However, when removing the belt 4 using the above-mentioned means, loosening each adjustment screw 52 is troublesome, and when reattaching the belt 4, the tension of the belt 4 must be adjusted to an appropriate level again. In addition, there were various problems in terms of workability, such as the need to accurately set the tightness of each adjustment screw 52.

This idea was made in view of the above points,
An object of the present invention is to provide a conveyor in which the work of attaching and detaching the belt or chain of the conveyor is extremely easy.

An embodiment of this invention will be described below with reference to the drawings. This embodiment will be explained using a belt conveyor as an example of the conveyor. FIGS. 2a and 2b show a schematic configuration of a belt conveyor to which this invention is applied, and the same parts as in FIG. 1 are given the same reference numerals, and the explanation of the overlapping parts will be omitted. Second
In Figures a and b, reference numeral 6 denotes a lever rotatably supported on a support shaft 7 near one end of the frame 1 (the side where the belt tension setting section 5 is not provided). This is explained by: The support shaft 7 is provided on or above a line connecting the roller shafts 2 ₁ and 2 ₂ supported in notched grooves 11 ₁ and 11 ₂ , respectively, as shaft support portions. Lever 6 above
A hook portion 61 as an engaging portion that can be engaged with one of the roller shafts ₂₂ is formed at the tip of the hook portion 61.
As shown, the four sides 61a, 61b, 61
The corner of the side 61c and the side 61d is chamfered as shown in the figure. and,
When this lever 6 is positioned parallel to the frame 1 as shown by the solid line in the figure, its side 61
c restricts the movement of the shaft ₂₂ in the direction of the arrow X,
If the position is as shown by the dashed line in the figure, the axis 2 ₂
The movement of the frame 1 is made free within the cutout groove ₁₁₂ of the frame 1.

Next, the operation of such a configuration will be explained. Under normal conditions, the lever 6 is in the position shown by the solid line in the figure, and the shaft ₂₂ is in pressure contact with the side 61c of the lever 6. In this normal state, the belt tension setting section 5 adjusts the tightening of the adjustment screw 52 so that the tension of the belt 4 is optimal, as described above.

To remove the belt 4 from this state, the lever 6 may be rotated in the direction of arrow A. That is,
When the lever 6 is rotated in the direction of arrow A, the engagement between the shaft ₂₂ and the side 61c of the lever 6 is released, and the shaft ₂₂ is disengaged from the side 61c of the lever 6.
can be moved inward of the frame 1 using the notch structure ₁₁₂ of the frame 1 as a guide. As a result, the tension of the belt 4 is released, so the roller 3 ₁ side is pulled to the outside of the frame 1 and the shaft 2 ₁ is inserted into the notch groove 11.
The belt 4 can be easily taken out by pulling it out _from the notch groove 112 and then pulling out the shaft ₂₂ on the roller ₃₂ side from the notch groove ₁₁₂ .

After replacing the belt 4 and completing maintenance and inspection work in this way, in order to restore it to its original state, first insert the roller 3 ₂ side into the notch groove 11 ₂ of the frame 1, then the roller 3 ₁ side. into the notched groove ₁₁₁ , and then while pulling the roller ₃₂ side a little in the direction of arrow X', turn the lever 6, which is located at the dashed line in the figure, in the direction of arrow A', and move it to the position shown by the solid line in the figure. Then, the shaft ₂₂ is pressed into engagement with the side 61c of the lever 6. In this state, since the adjustment screw 52 of the belt tension setting section 5 has already been adjusted, there is no need to perform it again. Note that if it is necessary to make fine adjustments, the adjusting screw 52 may be slightly operated.

By the way, by positioning the support shaft 7, which serves as the pivot point of the lever 6, on or above the line connecting the shafts 2 ₁ and 2 ₂ , the following effects can be achieved. In other words, the force applied to the shaft ₂₂ due to the tension of the belt always moves the lever 6 around the support shaft 7.
A moment is generated to rotate it in the A′ direction. Moreover, the lever 6 itself also generates a moment that causes it to rotate in the A' direction due to its own weight. On the other hand,
Since the rotation of the lever 6 in the A' direction is suppressed by the roller shaft ₂₂ that is locked in the notched groove ₁₁₂ ,
The shaft 2 ₂ is not disengaged from the lever,
It is reliably engaged and held by the side 61c of the hook portion 61 of the lever 6. In addition, in order to prevent the lever 6 from being rotated in the direction A due to belt tension and disengaging from the shaft ₂₂ , the shape of the hook portion is variously changed.
It may be biased by a spring or the like, or may be provided with another hooking means. Furthermore, the belt is not limited to the flat belt shown in the drawings, but may also be applied to V-belts, round belts, chains, etc.

As described above, according to this invention, it is possible to take out the belt or chain with almost one-touch operation, just by rotating the lever, eliminating the troublesome work of loosening screws as in the past, and moreover, leaving the belt or chain in its original state. Even when restoring the belt or chain to its original state, it is possible to restore the belt or chain to its original state with almost one-touch operation, just by rotating the lever, without having to readjust the tension of the belt or chain. It is possible to provide a conveyor that can greatly simplify the work of taking out the belt or chain when performing maintenance and inspection work on the mechanism.

[Brief explanation of the drawing]

Figures 1a and b are a plan view and a side view showing an example of a conventional belt conveyor, Figures 2a and b are a plan view and a side view showing an example of a belt conveyor to which this invention is applied, and Figure 3 is a plan view and a side view showing an example of a conventional belt conveyor. FIG. 3 is an enlarged view of the main part of FIG. 2; 1... Frame, 2 ₁ , 2 ₂ ... Axis, 3 ₁ , 3
₂ ...Roller, 4...Belt, 5...Belt tension setting section, 6...Lever, 11 ₁ , 11 ₂ ...Notch groove, 61...Hook portion, 7...Spindle.

Claims (1)

[Scope of utility model registration request] Two rollers or sprockets on which the belt or chain of the conveyor is spanned have a shaft support section near both ends that supports each roller shaft or sprocket shaft so that it can slide by a predetermined amount so that the distance between these rollers or sprockets can be varied. A support shaft provided on or above a line connecting the frame and each roller shaft or sprocket shaft supported by the shaft support parts at both ends on the outside near at least one shaft support part of the frame, and this support shaft as a fulcrum. A lever is rotatably mounted as a lever and has an engaging portion at its tip that can be engaged with one of the roller shafts or the sprocket shaft, and the lever can be engaged with the one of the roller shafts or the sprocket shaft. When the conveyor belt or chain is in the engaged state, the belt or chain of the conveyor is maintained in a tensioned state, and when the lever is disengaged from the one roller shaft or sprocket shaft, the one roller shaft or sprocket shaft is A conveyor characterized in that the belt or chain of the conveyor is released from tension by allowing the axis to move freely.