JPS6229325B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for lifting and lowering a skid, which is necessary when a painted automobile body is placed on the skid and transported up and down to and from a drying angle-type furnace disposed above the floor surface. Regarding equipment.

Conventionally, in order to carry out the material to be dried into such a drying oven, the material to be dried is conveyed horizontally to a fixed position by a chain conveyor, then lifted vertically by an elevator at the rear of the oven, and then moved horizontally inside the oven again. Drying work was carried out while being transported, and the dried material was lowered by an elevator at the front of the furnace, and then transported horizontally. Therefore, the conventional method of carrying in and out of the drying oven using an elevator requires a long transportation cycle and is inefficient because the elevator moves back and forth in the vertical direction. It was hot. Furthermore, the conventional type requires two elevators before and after the furnace, as well as a horizontal conveyor to connect them, making the structure complex and not only uneconomical, but also prone to breakdowns. It was something that caused a lot of damage.

Therefore, the present invention provides an elevating and lowering conveyance device that eliminates the above-mentioned drawbacks of the conventional type.The present invention will be explained in detail below with reference to the drawings.

The skid elevating and lowering conveyance device of the present invention is shown in Figs.
As shown in FIG. 5, a horizontal conveyance surface is connected to the skid carry-in roller conveyor R, and has a height not lower than the conveyance surface of the roller conveyor R and a length not shorter than the length of the skid in the conveyance direction. The skid carry-in transfer section B'-C, the skid upwardly inclined conveying section C-C', the elevated horizontal conveying section C'-D', and the skid's downwardly inclined conveying section
A two-striped parallel conveyance chain 1 having a skid conveyance surface formed by successively forming a skid transfer section D'-D and a skid unloading transfer section D-E' having a horizontal conveyance surface whose length is not shorter than the length of the skid in the conveyance direction. . 5 and 5 are directly placed on each other, and the front horizontal member 4 is protruded from each of the parallel conveyance chains 1 and 1' so as to be rotatable only in the opposite direction. 6, 6' and the front escape prevention pieces 7, 7'.

The skid 3 on the skid carry-in roller conveyor R located at the left end in FIG. 1'.The loading section is A in Figure 1.
-B, and in this section, the conveyor chains 1, 1' are laid horizontally by a distance _L1 . skid 3
When the front horizontal member 4 arrives within the carry-in section,
The push conveyor 8 turns around the sprocket 9 and leaves the skid 3 waiting in that position. Then, as shown in FIG. 7, the front escape prevention piece 7 pivotally attached to the conveyor chains 1, 1' traveling in the direction of the arrow comes into contact with the front horizontal member 4 of the skid 3 and becomes inverted. The transport chain moves forward and stands up again due to the balance around the pivot point, and then the tip of the backward skid prevention piece 6 pivotally connected to the conveyor chain 1, 1' comes into contact with the horizontal member of the skid 3. At this time, since the horizontal section _L1 exists in the conveyance chains 1, 1', the front escape prevention piece 7 and the skid 3 are smoothly carried in without interfering with each other. Then, when the backward skid prevention piece 6 and the front horizontal member 4 of the skid 3 engage, the conveyor chains 1, 1' rise by a slight height H ₁ + H ₂ and reach point B', and the skid The front horizontal member 4 is transferred and placed on the link plate of the conveyance chain. Here
H ₁ is the vertical distance between the upper end surface of chains 1 and 1' in section A-B and the lower end surface of skid 3 placed on skid carry-in roller conveyors R and R, and H ₂
is the vertical distance between the lower end surface and the upper end surface of the conveying chains 1, 1' after being raised, and H ₂ is set to be much smaller than H ₁ . Therefore, the conveyor chains 1 and 1' are laid horizontally from point B' to point C, and the conveyor chains 1 and 1' are laid horizontally from point B' to point C.
B'-C is formed (Fig. 1), and the length _L2 of this skid carry-in transfer section B'-C has a length not shorter than the length L of the skid in the conveying direction. , 1' enter the upwardly inclined conveyance section C-C'. In this way, the length of the skid loading/transfer section B'-C is L ₂
The reason for choosing a length that is not shorter than the length L of the skid 3 is that if the length of the skid loading/transfer section B'-C is
If L ₂ is set shorter than the skid length L, when the front end of the skid enters the upward slope, the rear end of the skid will be located on the skid carry-in roller conveyor R as shown in FIG. 8, and the skid 3 will advance. As a result, the rear end of the skid intermittently passes over the rollers of the roller conveyor R, causing the rear part of the skid to move up and down, causing the transported items placed on the skid to fall due to the reaction. This is to prevent such dangers as they may occur.
When the front end of the skid 3 reaches point C, it is completely transferred onto the link plates of the conveyor chains 1 and 1', and the skid 3 moves upwardly incline conveying section C-C' to the first point.
As shown in the figure, it ascends, passes through an elevated horizontal section C'-D', descends again through a descending slope conveying section D'-D', and reaches a skid unloading transfer section D-E'. The section D-
The length L ₂ ' of E' is the skid loading/transfer section B'-C.
The length L ₂ of the conveying chain 1,
1' shall be installed. In the section E'-E, the chains 1, 1' again descend by a small height H ₁ +H ₂ in the same manner as described above and reach the discharge section E-F. The length L ₃ of this carry-out section EF is made sufficiently longer than the distance L ₁ of the carry-in section A-B to ensure smooth conveyance of the skid 3 and transfer to the delivery conveyor 10. Note that skid 3 is C in Figure 1.
At point C' and point C', the conveyor chains 1 and 1' are in a string-like state as shown in the figure.
Considering this situation, the distance between the backward skid prevention pieces 6, 6 attached to the skid 1' needs to be longer than the length L of the skid 3.

The present invention has the above configuration and has the following effects.

In the lifting device of the present invention, the skid 3 is made of a rectangular member, and only the horizontal members 4 and 5 of the skid 3 are directly placed between the link plates of the parallel conveyance chains 1 and 1'. is backward skid prevention piece 6
and the front escape prevention piece 7,
Skid loading transfer section of parallel conveyance chains 1 and 1'
Since the length L ₂ of B'-C is not shorter than the length L of the skid, the conveyor chains 1, 1'
is from the horizontal conveyance state to the upwardly inclined conveyance section C in Fig. 1.
Even if it is bent to move to -C', both horizontal members always come into contact with the link plates of the chains 1 and 1' as shown in the same figure, and the rear end of the skid 3 is moved up and down intermittently. The skid can be held on the link plate and smoothly move up and down the bent part without moving and without the skid sliding backward or running forward, so the cargo on the skid can be transported safely without falling. It is something that can be done.

By tilting the skid and transporting it at places where it is necessary to raise and lower it, such as at the entrance and exit of a drying chevron oven located above the floor, it is possible to transport the goods W continuously. Therefore, the efficiency of transportation is improved, and since the skid is placed directly on the link plate of the conveyance chain and conveyed up and down, there is no need to arrange rollers etc. to support the skid along the conveyance path. The present invention provides a skid elevating and lowering conveying device which has a simple structure and is free from failures, since the conveying means and supporting means for the skid can be carried out only by the conveying chain.

[Brief explanation of the drawing]

FIG. 1 is an explanatory elevational view showing a skid elevating and lowering conveyance device of the present invention, and FIG. 2 is a sectional view taken along the Y--Y arrow in FIG. 1. FIG. 3 is a perspective view of the skid, FIG. 4 is an elevational view of the skid on which the automobile body is placed, and FIG. 5 is a right side view of the skid. FIG. 6 shows a first sectional view taken along the line X--X. FIG. 7 is an explanatory diagram showing the engagement of the skid with the backward skid prevention piece of the conveying chain in the section A-B of FIG. 1. 8th
The figure is an explanatory diagram when the distance _L2 of section B-C in FIG. 1 is shortened. 1...Transportation chain, 2...Transportation object placement section, 3...
... Skid, 4... Front horizontal member, 5... Rear horizontal member, 6... Reverse skid prevention piece, 7... Front escape prevention piece, 8... Push conveyor, 9... Sprocket, 10... Sending conveyor, W...Transportation object,
R... Skidded loading roller conveyor.

Claims (1)

[Claims] 1. A skid carry-in transfer section connected to a skid carry-in roller conveyor and forming a horizontal conveyance surface having a height not lower than the conveyance surface of the roller conveyor and a length not shorter than the length of the skid in the conveyance direction; A skid ascending slope conveyance section, an elevated horizontal conveyance section, a skid downward slope conveyance section, and a skid unloading transfer section having a horizontal conveyance surface with a length not shorter than the length of the skid in the conveyance direction;
Two parallel conveyance chains having skid lifting and lowering conveyance surfaces formed in succession are laid, and a front horizontal member of the skid consisting of a rectangular frame having a transported object loading section between the link plates of the parallel conveyance chain. The rear horizontal member is placed on top of the rear horizontal member, and the front horizontal member is positioned between a backward slip prevention piece and a front runaway prevention piece that protrude from each of the parallel conveyance chains so as to be rotatable only in opposite directions. Skid lifting and lowering conveyance device featuring: