JPH0238207A - How to correct chain conveyor slack - Google Patents

Abstract

PURPOSE:To correct opening conditions of a wicket by a method wherein both sprockets of a chain conveyer are replaced with sprockets with gear pitches P1, P2 alternately formed. CONSTITUTION:An axial hole of one of links 3 which are rotatably pivoted on a roller axis 1 and/or the roller 1 are/is worn so that rattling sometimes occurs between the roller axis 1 and the axis hole of the link 3. In this case, the angle of a wicket 7 differs so that the wicket 7 and a painted metal plate 6 collide against each other. In such a case, a sprocket 9 having a uniform pitch P1 is removed and replaced with a sprocket 14 with gear pitches P1, P2 alternately formed where P1<P2, and the sprocket 14 is operated with the gear pitch P1 fitted to a pitch P1 between roller axes of a normal link 2 and with a pitch P2 between roller axes of a lengthened link 3 fitted to P2.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention is directed to, for example, transporting coated printed metal plates immediately after printing into a dryer in a separated state one by one from one side, and drying the coated printed metal plates after printing. This invention relates to a slack correction method for a chain conveyor that carries out one sheet at a time from the other.

[Prior art]

For example, in the can manufacturing industry, printing is performed on a thin metal plate for multiple can bodies, divided by the size of the original plate, for multiple can bodies.
After drying in an oven, the can bodies are obtained by cutting into individual can bodies to obtain blanks for forming can bodies, rolling them up to form can bodies, and attaching can lids. In the production of coated printing plates using this method, a thin metal plate is coated with paint using a roller coat, and then transported by a belt conveyor to the entrance of a tunnel oven. The sheet is inserted and supplied, passed through an oven to be baked and dried, and at the exit of the oven, the baked and dried coated printed metal plate is transferred from the wicket to a belt conveyor.
This was done by loading on stackers. The endless chain conveyor of such an oven is constructed as follows.

That is, as shown in FIGS. 1 to 4, a link 2 has a roller axle load fixed at both ends, and both ends are rotatably supported on the opposing roller shaft 1 of the adjacent link 2. The pitch P between the roller shafts 1 is set by alternately connecting the links 3,
The chain 4 is arranged in the dryer 5 at an appropriate interval, and is coated between the left and right opposing links 2 and 3. Both side legs 2a of RIKERA) 7 supporting the printed metal plate 6
are fixed to form a chain conveyor 8.

Sprockets 9 and 1 are provided at the front and rear of the chain conveyor 8 for conveyance and have teeth at a constant pitch P.
0, the wicket 7 is opened as shown in the figure, and the painted printed metal plate 6 immediately after printing is carried in and supported between the opened wickets 7. After drying in the dryer 5, the sprocket 10 It was made so that the Leichella J.7 was opened in the room and gushed out. In the figure, 11 is a sprocket for tension, 12 is a bell 1-conveyor for carrying in having a magnetic pulley 12a, and 13 is a bell 1-conveyor for carrying out having a magnetic pulley 131L.

The pitch P between the roller shafts 1 of the chain 4 is equal as shown in FIG. Equal as shown.

[Problem to be solved by the invention]

Chain conveyors with wicks used in ovens as described above have the following problems.

(a) Due to use, the roller shaft 1 can rotate (the shaft hole of one of the links 3 supported on the As shown in FIG. As shown in the figure, the sprocket l-9,1
Since the pitch of 0 is normal at P, when the shaft span pitch of link 3 is P2, the roller shaft 1 of one link 2 is halfway between the teeth of sprocket yl 9°10 as shown by the imaginary line. As a result, the angle of the wicket 7 attached to the link 3 deviates from the normal case by an angle θ. Therefore, as shown in FIG. 1, the timing at which the painted printed metal plate 6 is carried in at high speed is hindered by the shift of the wicket 7, and the tip of the painted printed metal plate 6 collides with the wicket 7, causing damage to the printed surface. However, there is a problem that the coated printed metal plate 6 is bent and becomes unusable.

(b) In the above case, wicket 7 is a separate issue, and the entire chain 4 must be replaced with a new one, which is extremely uneconomical.

[Means for Solving Problem 11] The structure of the present invention that solves the problems of the prior art includes a link 2 having a roller shaft fixed to both ends thereof, and a link 2 having both ends fixed to the opposing roller shafts of the adjacent links 2. The parts are rotatably supported by links 3, which are alternately connected to form an endless chain.
The chains are arranged on the left and right with appropriate intervals, and the left and right opposing links 2.3@(ζwig, soj.
A chain conveyor is constructed by fixing the legs on both sides of the chain conveyor, and the wicket is opened when passing through the sprockets disposed at the front and rear ends of the chain conveyor, and the plate-shaped object is placed between the opened wickets in a timely manner. It is a conveyance means that inserts and supplies, and also takes out and conveys a plate-like object, (Due to running, the shaft hole of one link 3 supported by the roller shaft and/or the roller shaft is worn out. However, the shaft span pitch P2 of the link 3 is larger than that of the other link 2.
When the normal pitch P between the roller axes becomes thicker (
The tooth pitch PI for both sprockets of the above chain conveyor
, P2 are replaced with sprockets 91 formed alternately, and the opening condition of the wick when passing through the sprockets is corrected to a normal state.

〔Example〕

Embodiments of the present invention will be described in detail with reference to the drawings.

Figure 1 is a partially cutaway side view of a printing dryer for painted printed metal plates, Figure 2 is a front view of a wicket installed at the required angle on each link, and Figure 3 is a side view showing a chain with a normal pitch. , FIG. 4 is an exploded view of a sprocket for driving a chain with a normal pitch, FIG. 5 is a side view showing a chain with an abnormal pitch, and FIG. 6 is a sprocket for driving a chain with an abnormal pitch, that is, used in the method of the present invention. The developed view of the sprocket, FIG. 7, is a front view of a part of the abnormal pitch sprocket l-.

In the means for carrying the coated printed metal plate 6 into the dryer 5 and taking it out by IJR based on the above-mentioned FIGS. And/or the roller shaft 1 is worn out, and a crack occurs between the roller shaft 1 and the shaft hole of the link 3, and the angle of the wicket 7 is shifted as explained in FIG.
When a collision occurs between the sprocket 9 and the painted printed metal plate 6, or when an abnormal pitch P2 is confirmed during maintenance and inspection, the sprocket 9.10 with the above-mentioned uniform pitch P
P as shown in Figures 6 and 7.

The sprocket 14 was replaced with a sprocket 14 that alternately formed tooth pitches P and P2 with the condition of < P t, and the tooth pitch P.

to the normal pitch P between the roller shafts of link 2, and the pitch P between the roller shafts of link 3 with longer tooth pitch P2.
2 and operate.

〔Effect of the invention〕

As described above, according to the present invention, the following effects can be obtained.

(,) For the roller axis pitch P1 of link 2,
Even if the pitch P2 between the roller axes of the link 3 changes greatly,
By replacing the sprocket with a sprocket that alternately has tooth pitches P, . . . P2 corresponding to the pitches P, .

(bl) Since it is sufficient to simply replace the sprocket instead of replacing the entire chain as in the prior art, the economical effect is large.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway side view of a printing dryer for painted printed metal plates, Figure 2 is a front view of a wicket installed at the required angle on each link, and Figure 3 is a side view showing a chain with a normal pitch. , Fig. 4 is an exploded view of a sprocket for driving a chain with a normal pitch, Fig. 5 is a side view showing a chain with an abnormal pinch, and Fig. 6 is a sprocket for driving a chain with an abnormal pitch.
FIG. 7 is a front view of a part of the abnormal pitch sprocket, and FIG. 8 is a developed view of the sprocket used in the method of the present invention. It is an explanatory diagram showing an angle change of . 1 Roller shaft, 2, 3-link, 4-chain. 5 Dryer, 6...Painted printed metal plate, 7...Leichera 1
-, 7a Legs, 8 Chie: / Nianbe 7.9.
10.14 Sprocket +-. Figure 2

Claims (1)

[Scope of Claims] A link (2) having a roller shaft fixed to both ends, and a link (3) having both ends rotatably supported on the opposing roller shaft of the adjacent link (2). are alternately connected to maintain the pitch of the roller shafts evenly to form an endless chain, and the chains are arranged on the left and right at appropriate intervals, and the left and right opposing links (2) (3) fixing both legs of the wicket between them to form a chain conveyor, and opening the wick when passing through sprockets disposed at the front and rear ends of the chain conveyor;
This conveying means is designed to insert and supply plate-shaped objects between the opened wickets in a timely manner, and to take out and carry out the plate-shaped objects.
) and/or the roller shaft are worn out, and the shaft span pitch (P_2) of the link (3) has become smaller than the other link (
When the pitch becomes larger than the normal pitch (P_1) between the roller axes in 2), both sprockets of the chain conveyor are replaced with sprockets with alternating tooth pitches (P_1) and (P_2), and the roller passes through the sprockets. A method for correcting slack in a chain conveyor, comprising correcting the wicket opening condition to a normal state.