JPH036277B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a jig used for replacing various rolls such as canvas rolls in paper dryers.

(Prior art) In paper mills, endless strips made of wire, felt, and canvas are used for the wire part, breath part, and dryer part, respectively, and these endless strips are rolled into many rolls. As a result, it is forced to perform a rotational motion. If it is determined that replacement is appropriate during maintenance inspection of conventional rolls,
The work of removing the old roll and installing the new roll is carried out, but this work requires a long time, is difficult, and is always accompanied by danger. This situation is not limited to paper mills, but also applies to factories in various industries that handle rolls used to rotate endless strips.
This was a problem when it was replaced.

The weight of the canvas roll is several hundred kilograms when replacing it.
Taking the roll removal work as an example, the work procedure is generally as follows.

Loosen the canvas → Suspend and support both ends of the roll with a chain block → Remove the brackets at both ends of the roll → Remove the stand from the bracket as well, and place two supports and a guide plate with rails under the roll in the width direction of the canvas → Two supports Lift both ends of the canvas with a chain block and lift the canvas away from the roll → Place two trolleys on the conductor plate, gradually lower the roll and place both ends on the trolleys → Remove the chain block from one end of the roll , pull out the entire trolley from the other end. The above is the conventional removal procedure, and the roll installation is generally performed in the opposite procedure.

Although the above procedure differs depending on the purpose, function, installation conditions, etc. of the roll, the reality of the difficult work being forced is the same.

(Problems to be Solved by the Invention) The conventional method described above uses a large number of jigs such as columns, conductive plates with rails, and carts, which makes the work complicated.
There is also a high risk of an accident occurring when a heavy roll is carried in or out from under an endless strip such as a canvas. The present invention provides a new jig for safely and easily performing roll replacement work in a short period of time.

(Means for Solving the Problems) The roll replacement guide according to the present invention allows detailed work for removal or attachment to be carried out after the roll to be replaced is once accommodated in the guide. The main body is a pipe with a larger diameter and shorter length than the roll, with cutouts open at both ends of the pipe parallel to the length direction, and along the inner surface of the pipe along the cutouts. It is characterized by a pair of sliding means attached on both sides.

(Function) The guide device according to the present invention is used by accommodating a roll therein and pushing it under a strip-like object such as a canvas. When the guide tool is completely pushed in, the guide tool takes over the weight of the strip that should be placed directly on the roll, making it easier to carry in and out the old and new rolls. The notch provided in the guide device essentially becomes a passage for the chain, and when moving the roll, the roll can be moved in and out of the guide device while it is suspended on the chain block, and when moving the guide device, it can be moved in and out of the guide device. can freely operate to accommodate or remove the roll. Further, by providing sliding means on both sides along the notch, relative movement between the guide and the roll can be smoothly performed when pushing and pulling out the guide and inserting and removing the roll.

(Example) The present invention will be described below based on an example shown in the drawings.

FIG. 2 is a perspective view showing the guide tool according to the present invention being pushed along the roll. However, the canvas is omitted in FIG. 2. The guide tool 1 has a main body of a pipe 5 having a larger diameter than the roll 10, and its length is shorter than the roll 10. This pipe 5 is provided with a notch 2 parallel to the length direction of the pipe, and the notch 2 is left open at both ends of the pipe 5. Furthermore, a large number of bearings 3 are attached to the inner surface of the pipe 5 along both sides of the notch 2 as sliding means.

To use this guide tool 1 as a jig when replacing the roll 10, first loosen the canvas (not shown) extending perpendicularly to the roll 10, suspend and support both ends of the roll 10 with the chain block 11, and then Of the roll brackets, remove only the upper bearing stand (not shown).

Next, the guide tool 1 is pushed in so that the entire roll 10 is accommodated in the guide tool, with the notch 2 positioned upward and sliding over the roll 10 by the bearing 3. At this time, the wire 12 that has lifted the roll 10 is automatically guided to the notch 2 facing upward, so the wire 12 does not become an obstacle at all when pushing the guide tool 1, and the bearing 3 is guided along the notch 2. Since the bearings are disposed on both sides of the notch, the weight of the guide 1 on the roll 10 is borne equally by the bearings on both sides of the notch, resulting in smooth sliding.

When the guide 1 is pushed in until the wire 12 guided through the notch 2 emerges from the other end of the notch, the roll 10 is housed in the guide except for both ends, and both exposed ends are suspended and supported by the chain block. It will be in a state where it is Now, rotate the guide 1 180 degrees around the outer circumference of the roll 10 to turn it upside down, and return both ends of the roll 10 to the original bearing stand (not shown) or place it on a suitable support. , remove the chain block that was suspending and supporting the roll, and lift the guide instead.

In the present invention, the sliding means is not limited to bearings, but may be of any other structure.

FIG. 1 is a perspective view showing the guide tool in a lifted state, and the canvas 13 placed on the roll 10 is placed on the guide tool 1. In this state, the bearing 3 that slidably supported the guide tool 1 in FIG. 2 now supports the roll 10 so that it can slide. When lifting the guide, the notch 2 is always in a position facing downward, so eye bolts 7 are installed in advance on the outer periphery of the guide near both ends of the outer surface 180 degrees opposite to the notch 2. This makes it convenient for lifting work. However, the second
As with the roll in the figure, it may be lifted using a wire, or a locking means other than eye bolts may be used.

When the guide is lifted up and stopped at an appropriate height, the rolls 10 in the guide rest on the bearings 3 on both sides of the notch 2, and can be quietly pulled out. Attachment of the rolls will be performed by the reverse method.

Although the canvas 13 is not shown in FIG. 2, the one between the two chain blocks that suspends and supports the roll 10 and is transitioning from the top of the roll 10 to the top of the guide tool 1 is shown in the drawing. It has been omitted. In this way, when pushing the guide tool shown in FIG. 2, the upper part of the guide tool 1 is pushed between the roll 10 and the canvas 13, but the canvas 13 does not completely hang down. Therefore, this task is easy. That is, it is equivalent to slightly widening the gap between the roll 10 and the canvas 13 vertically, and by using the bearing 3, the guide tool 1 can be inserted so as to slide on the upper surface of the roll 10.

FIG. 3 shows a side view of the guide tool 10 rotated 180 degrees around the outer periphery of the roll 10 after being pushed in, and the roll 10 is housed in the guide tool 1 with the notch 2 facing downward. There is. Since this roll 10 is slidably mounted on the bearing 3, from the viewpoint of safety, it is desirable to provide through holes near both ends of the guide so that the stopper 8 can be inserted. The structural shape of the stopper is arbitrary, and it is sufficient that it can temporarily stop the sliding of the roll 10.

In FIG. 3, the canvas 13 should normally be in direct contact with the roll 10, but that contact is reversed by the guide tool 1. Therefore, it can be seen that the weight of the canvas 13 is not applied to the roll 10 at all, and as a result, the work of removing and attaching the roll 10 is facilitated.

(Effects of the Invention) The guide device according to the present invention functions extremely effectively during roll replacement work. That is, since the work can be carried out while at least one of the roll body or the guide holding the roll is suspended and supported by the chain block, the work can be carried out with peace of mind without the risk of the roll falling.

Specifically, the work of pushing or pulling out the guide tool under an endless strip such as a canvas can be accomplished by sliding it over the roll using a sliding means, and by carrying out or carrying the roll from inside the guide tool. Sliding means can likewise be used for the operation. Further, by providing the notch, the chains and wires of the chain block will not get in the way of work. In this way, since the entire work process of roll replacement is taken into consideration, the work can be carried out safely, quickly and easily.

[Brief explanation of drawings]

The drawings all show embodiments of the present invention, and Fig. 1 shows a state in which a roll is being pulled out from the guide device according to the present invention, and Fig. 2 shows a state in which the guide device is pushed in so as to store the roll. FIG. 3 is a side view corresponding to FIG. 1 immediately before the roll is taken out. 1... Guide body, 2... Notch, 3... Bearing, 5... Pipe, 10... Roll, 13...
…canvas.

Claims (1)

[Scope of Claims] 1. A pipe having a larger diameter and shorter length than the roll is provided with notches that are open at both ends of the pipe parallel to its length, and a pair of sliding slides are provided on both sides of the inner surface of the pipe along the notches. A roll replacement guide tool characterized by having a means attached thereto. 2. A roll replacement guide characterized in that the sliding means is a bearing.