JPH0444489Y2 - - Google Patents

Description

[Detailed Description of the Invention] a. Field of Industrial Application The present invention relates to slats of a slat conveyor that is used on the loading platform of a traveling vehicle such as a truck or trailer and moves back and forth.

b. Prior Art For the purpose of saving labor and streamlining cargo handling operations, trucks and trailers equipped with a slat conveyor on the loading platform are used. This system is equipped with roller chains on both sides of a slat conveyor that is stretched over the entire loading platform, and the roller chains are driven and circulated back and forth to move the cargo on the slat conveyor, which is stacked in front or behind the loading platform, to an operating switch, etc. This allows the worker to freely move the cargo forward or backward, and move the cargo to the back or front of the platform without having to climb onto the platform each time.

A part of such a conventional slat conveyor is schematically shown in FIG. The figure is cut in a direction perpendicular to the forward and backward movement direction of the conveyor, where a is a slat made of a square pipe, b is a roller chain provided on both sides of slat a, and c is a guide for roller chains b on both sides. d is a roller fixed to the center of slat a, e is a rail that guides roller d, and f is a cross member that supports the device.
A distributed load from the load g is applied almost uniformly to the upper surface of the slat a, and this load is received by the cross member f via the central roller d, the roller chains b on both sides, and the rails c and e.

In addition, as a document regarding the prior art,
No. 14163, Jitko No. 49-20649, Jitko No. 51-24884
There are numbers, etc.

c. Problems that the invention aims to solve In recent years, labor-saving and rationalization of cargo handling has progressed further, and containers with casters for storing small cargoes have come into use. As a result, a concentrated load is applied to the slat conveyor directly below the caster, and in the case of a slat conveyor with a conventional structure, the slats may be deflected, which may impede the smooth movement and circulation of the slat conveyor and its durability. . Therefore, consideration has been given to supporting the conveyor by supporting the back side of the slats directly below the casters with rails provided with anti-friction material, or by providing a number of rollers corresponding to the number of casters and rails to receive them.

However, in order to fix the rollers at several locations on the slat, it is necessary to manufacture and process parts similar to those for the conventional roller d installed in the center of the slat, as well as troublesome installation work, which is not only inefficient but also
There was a problem in that the cost increase was significant.

The present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to provide a slat for a slat conveyor in which rollers with low frictional resistance can be easily installed at necessary locations on the slat conveyor.

d Means for Solving the Problems In order to solve the problems mentioned above, the present invention provides roller chains at both ends of the slats, and engages the roller chains with rails provided at the ends of the cross member to move the top and bottom of the cross member. In the slat conveyor, a cross-shaped material is punched out and bent in the same direction to form a housing, and one opposing wall of the housing has a bearing section cut out from its end. At the same time, a knurl is carved on the outer surface of the other opposing wall,
Separately, a pin is provided that rotatably supports the roller.
Grooves are provided near both ends of the pin, and the grooves are inserted and fixed into the bearing portion of the housing to constitute a roller assembly, and the roller assembly has a U-shaped cross section. It is press-fitted and fixed in place.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In Figs. 1 to 5, 1 is a conveyor slat made of a bar with a U-shaped cross section, 2 is a roller chain provided at both ends of the slat 1, and 3 is a conveyor slat that supports the roller chain 2. 4 is a frame assembly consisting of a cross member etc. that supports the device; 5 is a frame base; the frame base 5 is placed and fixed on the upper part of the floor plate of the loading platform;
is fixed.

The slat 1 having the roller chains 2 on both ends is constructed by arranging a large number of slats in parallel, connecting each roller chain 2 rotatably to each other, and laying the slats over the entire surface of the loading platform in the front-rear direction. The slats 1 are formed in a loop shape so that they can be circulated, and the roller chain 2 is moved by a drive sprocket (not shown), so that each slat 1 can move and circulate on the loading platform. That is, the roller chain 2 and slat 1 shown above and below the frame assembly 4 in FIG. 3 move in opposite directions.

20 is a roller assembly, and this roller assembly 20
is structured as follows. That is, 21 is a box-shaped housing having an opening on one side, and 22 is a bearing portion, which is provided in a notch state in one opposing wall portion 23 of the housing 21, respectively. 24 is a knurl, and housing 2
1 are carved on the outer surface of the other opposing wall portion 25, respectively. This housing 21 may be formed by punching out a material in a cross shape and bending each end in the same direction as shown by the chain line in FIG. The relative distance l between the opposing outer wall surfaces of the wall portion 25 is approximately equal to the distance L between the inner walls of the slat 1 (see FIG. 5), and is set to a fitting dimension that allows the roller assembly 20 to be press-fitted and fixed.

30 is a roller with a through hole in the center, 31 is a pin inserted into the through hole of this roller 30 to rotatably support the roller 30, and this pin 31 is
Grooves 32 are provided around both ends.
The distance between the grooves is equal to the relative distance between the opposing wall portions 23 of the housing 21.

The pin 31 is first inserted into the roller 30, and is press-fitted from above the housing 21 so that the grooves 32 at both ends of the pin 31 are aligned with the opposing bearings 22 of the housing 21. The roller assembly 20 is manufactured so as to protrude from the opening side ends of the rollers 23 and 25.

To secure the roller assembly 20 to the slat 1,
First, as shown in FIG.
After arranging the roller assembly 20 parallel to the wall surface of the slat 1, the roller assembly 20 is pressed into the slat 1 by pressing it in from above with a strong force. It is assumed to be directly below this caster 41.

Note that 35 is a rail installed on the frame assembly 4, and is placed directly below the roller assembly 20 to guide it.

FIG. 6 shows another embodiment, in which a rectangular cylindrical slat 51
A predetermined number of windows 52 are provided at positions where the roller assembly 20 is fixed.

Since the slat conveyor according to the present invention is constructed as described above, the movement and circulation of the conveyor can be performed in the same manner as the conventional one, and roller assemblies are installed at predetermined positions on each slat installed in parallel. There is. Therefore, when a container 40 equipped with casters 41 is loaded onto this slat conveyor, the roller assembly 20 is placed directly below the casters 41.
is located, and the concentrated load W applied via the caster 41 is supported by each roller assembly 20 and the rail 35, so that the slat 1 of the slat conveyor does not bend due to the concentrated load W. The conveyor moves and circulates smoothly.

e Effects of the invention As described above, according to the slat of the slat conveyor according to the invention, the rollers can be fixed to the slat by simply press-fitting the roller assembly containing the rollers in advance into the groove of the slat. It is extremely easy to install the rollers at the necessary locations that receive concentrated loads, and the number of installation steps can be greatly reduced. It also becomes possible to manufacture wide, heavy-load conveyors with long spans. Naturally, compared to the case where anti-friction materials are used, there is less frictional resistance, which saves power. Further, the roller assembly is easy to mold, does not require many parts, and can be easily assembled.

[Brief explanation of drawings]

Fig. 1 is a schematic explanatory diagram of the usage state of the slat conveyor according to the present invention, Fig. 2 is a structural perspective diagram of the conveyor, Fig. 3 is a structural explanatory diagram of the vicinity of the roller chain, and Fig. 4 is the roller chain. FIG. 5 is a perspective explanatory view showing how to assemble the roller assembly. FIG. 6 is a perspective explanatory view of another embodiment corresponding to FIG. 5. FIG. 7 is a conventional perspective view. FIG. 1... Slut, 2... Roller chain, 20
...Roller assembly, 21...Housing, 30...
roller.

Claims (1)

[Scope of utility model registration request] In the slat conveyor, a roller chain is provided at both ends of the slat, and the roller chain is engaged with a rail provided at the end of the cross member to circulate above and below the cross member. A housing is formed by bending the housing in the opposite direction, and one opposing wall of the housing is provided with a bearing portion cut out from the end thereof, and a knurl is carved on the outer surface of the other opposing wall. A pin rotatably supporting the roller is provided, a groove is provided near both ends of the pin, and the groove is inserted and fixed into the bearing part of the housing to constitute a roller assembly, and the roller assembly has a U-shaped cross section. At the required position of the concave groove of the slat,
A slat that is press-fitted and fixed.