JPH0342407A - Slat reciprocating conveyor - Google Patents

Abstract

PURPOSE: To prevent movement of a cargo in the opposite direction during drawing work by providing first and second reciprocating slats through a fixing slat, respectively connecting them to a driving means, making it possible to simultaneously drive both of the slats in the carrying direction and constituting it free to draw the other at the time when one of them stops. CONSTITUTION: First and second slats 16, 18 are juxtaposed in the longitudinal direction with a fixing slat 14 between them, respectively connected by cross direction connection driving beams 38, 42, connected to respective hydraulic cylinders 44, 46 by slat connectors 36, 40 and independently driven. Additionally, both of the slats 16, 18 are devised free to simultaneously move in the carrying direction of a cargo and free to draw in the opposite direction at the time when the other slat is in a stationary state. Consequently, at the time of drawing, the cargo is supported by the slat in a stationary state and the fixing slat 14. In this constitution, it is possible to prevent movement of the cargo in the opposite direction at the time of drawing.

Description

[Detailed description of the invention] (Yll top usage field) The present invention relates to a slat type reciprocating conveyor.

BACKGROUND OF THE INVENTION Conventional slat-type reciprocating conveyors are generally arranged to be movable in both vertical and longitudinal directions, or
It comprises several groups of slats arranged for one-like movement in one longitudinal direction and a subsequent movement in the opposite direction. These conventional conveyors provided gradual advancement of the load as retraction of the slats occurred during conveyor operation.

Therefore, conventional conveyors of this type are slow and wasteful of time and power.

(Problem to be solved by the invention) U.S. Patent Nos. 3,534,875 and 4.143
, 760 overcomes the shortcomings of earlier slat-type reciprocating conveyors. However, the features of the conveyor structure disclosed in the above-mentioned patent specifications are not necessarily required for all conveyors, and therefore are not efficient for certain conveying purposes.

SUMMARY OF THE INVENTION In its basic concept, the present invention provides for simultaneous movement of longitudinally extending longitudinally spaced alternating transversely spaced motors coupled to a first drive means for simultaneous movement. a first elongated reciprocating slat and an alternating laterally spaced longitudinal direction coupled to a second drive means for simultaneous movement, independent of the first slat; a second elongated reciprocating slat extending from the first reciprocating slat to a permanently fixed elongated fixed slat disposed between the first and second reciprocating slats, wherein all of the first and second reciprocating slats can be simultaneously moved in the transport direction of the load by the operation of both drive means, and one of the first and second reciprocating slats can be moved while the other of the first and second reciprocating slats is in a stationary state. can be retracted in the opposite direction while the load is being retracted in the opposite direction, so that the load is supported on the fixed slats and one reciprocating strut at rest while the other reciprocating strut retracts. The objective is to create a slat-type conveyor that requires only two sets of reciprocating slats to convey the load in one direction without moving the load in the opposite direction during the retraction operation of the reciprocating slats in the working cycle, with the basic configuration described above. This can be achieved by providing

Another object of the present invention is to provide a reciprocating conveyor whose drive mechanism consists of only two drive means, which are inexpensively available on the market.

Still another object of the present invention is to provide a reciprocating conveyor that can be used as a truck bed for loading and unloading trucks, so that it can be applied to conventional industrial conveyor applications. It is about providing.

Yet another aspect of the present invention is to overcome the limitations and disadvantages of conventional reciprocating conveyors.

Still another object of the present invention is to provide a reciprocating conveyor with simple construction, reliability of operation, and ease of maintenance for economical manufacture.

EMBODIMENTS The reciprocating conveyor of the present invention is an elongated delivery conveyor, a 5-cube conveyor, an elongated delivery conveyor, a truck, etc., for facilitating the transfer of loads to and from trucks. Regardless of the application, the conveyor may be used in a wide range of industrial applications, with vertically spaced vertically spaced walls 12 having fixed opposing sides 12 as required or desired. The support beams 10 are supported by a frame including laterally extending support beams 10, which are here I-beams and spaced apart in the q2 direction of the conveyor bed.

A number of longitudinally extending fixed slats 14 are attached to the support beam 10 at laterally spaced locations across the width of the conveyor, the fixed slats 14 extending along the length of the conveyor bed. ing. The longitudinal spacing between the fixed slats 14 includes first and second reciprocating slats 16.18 arranged to allow vertical sliding movement in both the up and down directions between opposite longitudinal ends of the conveyor. Uke is accepted. In the illustrated embodiment,
The fixed slat 14 is a reciprocating slat 16 which will be explained later.
．． 18 is provided with a lateral extension shaped to permit attachment of a slat connector (FIG. 3).

FIG. 2 shows a mounting arrangement for reciprocating slats of a conveyor of the present invention. As shown, each fixed slat 14 has an upwardly projecting terminal end 14'' and a laterally extending horizontal end portion 14°. The slat connector (
Figure 3) has an end portion 14° and a terminal end 1 as shown.
4'', with an angle member 20 overlying the intermediate portion 22 of the slat connector within said groove and reinforcing the attachment of the intermediate portion within said groove. A bore (not shown) extends through the angle member 20, the intermediate portion 22, the end portion 14° and the support beam 10, through which a bolt 24 removably secures them in place on the support beam.

As is clear from Figure 2.3, the slat connector is
By extrusion molding of synthetic resin with a low coefficient of friction, the third
It is constructed in the shape shown by the solid line in the figure. Preferably, the slat connector includes a notch 26 that allows the support portion 28 to fold into the angular configuration shown in phantom in FIG. In this position, the support portion 28 provides an angled support surface for the tapered edge of the reciprocating slat 16°18.

The slat connector also includes, at the other end, a generally inverted U-shaped end segment 30 attached to the terminal end 14''.

The upper closed portion of the end segment 30 forms a support for the reciprocating slat 16 or 18, and the outer downwardly extending angled end portion 30° provides a guide for the reciprocating slat. form. For this purpose, the reciprocating slat is provided with a pair of downwardly extending guide webs 32 that match the shape of said angled end portion.

A locking tab 34 at the lower end of the web 32 of the reciprocating slat 16,18 is provided overlying the lower end of the angled end portion 30°, thereby securing the reciprocating slat against upward displacement. For installation, use tab 34
to force it through the angled elastic end section 30゛.
This is obtained by pressing the slat downwards, with the end portion 30° springing back to lie on E of the locking tab 34.

As shown in FIG. 2, the fixed slats 14 and the reciprocating slats 16,18 are shaped such that their upper surfaces lie at the same height and form a substantially horizontal bed surface on which the load is placed. ing.

Furthermore, the width of the upper surface of the fixed slat 14 that supports the material is
It is shaped to be less than the width of the top surface of the reciprocating slats 16,18. The purpose of creating such a shape will be explained later.

Referring to FIG. 1, each first reciprocating slat 16 includes:
Laterally connected drive beam 38 by slat connector 36
attached to a common drive link means shown as. The other reciprocating slats, ie the second slats 18, are likewise connected to each other via a second slat connector 40 to a common transverse coupling drive beam 42. Therefore, the simultaneous movement of all the first reciprocating slats 16 in both the up and down directions causes the movement of the second reciprocating slats 18
is possible independently of the simultaneous movement of .

Drive means, namely a pair of double acting hydraulic cylinders 4 as shown
4.46 are each attached at one end to a support beam 10 which is a fixed part of the frame. The other end of said hydraulic cylinder is connected to each drive beam 38,40.

That is, hydraulic cylinder 44 is coupled to drive beam 38 and hydraulic cylinder 46 is coupled to drive beam 42. Therefore, the expansion and contraction of the piston of the hydraulic cylinder 44 causes all of the first reciprocating slats 16 to move uniformly and simultaneously in one or the other longitudinal direction, and likewise, the independent actuation of the hydraulic cylinder 46 , causing a uniform and simultaneous movement of the second reciprocating slat 18 in one other direction.

Fixed slats 14, which are arranged between adjacent reciprocating slats 16, 18, do not move at any time. The conveyor can be provided with the desired width by the use of additional reciprocating slats 16.18 and fixed slats 14, all reciprocating slats 16.18 being connected via transverse drive beams 38.42. and two hydraulic cylinders 44
．． 46 corresponding one.

Thus, for a load such as a box (not shown) placed on the feed side of a conveyor, for example the bottom of FIG. 1, the operation of this conveyor is as follows. First, the hydraulic cylinders 44,46 act together to retract their pistons, simultaneously moving the drive beam 38,42 and therefore all the reciprocating slats 16,18 towards the top in FIG. . Since the surface area of the reciprocating slats 16,18 relative to the box is much larger than the surface area of the fixed slats 14 relative to the box, the friction of the box against the slats is not great enough to prevent the box from moving with the reciprocating slats. Without,
Therefore, the box is carried forward (upwards in Figure 1).

Upon completion of retraction of the pistons of the hydraulic cylinders, the flow of liquid in one hydraulic cylinder, e.g. (towards the bottom of the figure), while the fixed slat 14 and the reciprocating slat 18
remains fixed. Since the total surface area of the stationary slats 14,18 relative to the box is greater than the surface area of the reciprocating slats 16 relative to the box, the friction of the box relative to the stationary slats is reduced as the reciprocating slats 16 move backwards (downward in Figure 1). prevent the box from moving backwards. When the reciprocating slat 16 is fully retracted, it comes to rest with the fixed slat 14;
The reciprocating slats 18 are then retracted. The box does not move backwards for the reasons described above.

When the reciprocating slats 18 are retracted, the hydraulic cylinders are again actuated in unison and all reciprocating slats 16.18
move forward uniformly.

The cycle described above can be repeated to continuously move the boxes from the beginning to the end of the conveyor.

The present invention thus provides a conveyor of simple construction, requiring only two single C5 power sources and two sets of reciprocating slats for completely satisfactory conveyance of objects. This conveyor requires only longitudinal sliding movement of the two sets of reciprocating slats, while preventing rearward movement of the objects conveyed by the conveyor.

The conveyor of the present invention may include various structural changes to the elements of the illustrated embodiment. For example, a double-acting hydraulic cylinder as the drive device is preferred for its simplicity and efficiency, but other conventional agitation devices can be used for the independent forward and backward movement of the two drive beams. Alternatively, instead of adding more rows of reciprocating and fixed slats to increase the width of the conveyor, the width of the slats can be increased to maintain the minimum number of slats required for the desired application. You may.

As described above, the reciprocating slat type conveyor of the present invention eliminates wasteful movement of objects during conveyance operation and can convey objects with a minimum amount of power.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a portion of a reciprocating conveyor according to the present invention. 2 is an enlarged end view of the reciprocating conveyor shown in FIG. 1; FIG. FIG. 3 is an end view of a reciprocating slat support for a conveyor according to the present invention. 10... Support beam, 14... Fixed slat 14. 16.18... Reciprocating slat, 28... Support portion of slat connector, 30... End segment of slat connector, 36.40... Slat connector, 38.42... Drive beam, 44 .46...Hydraulic cylinder.

Claims (8)

[Claims] (1) A slat-type reciprocating conveyor comprising an elongated frame, at least one elongated fixed slat fixed to the frame and extending longitudinally, and extending parallel to and on opposite sides of the fixed slat. first and second longitudinally slidable elongated reciprocating slats disposed and provided on the frame for vertically slidably supporting the reciprocating slats with respect to the fixed slats; a support means, a fixing means for connecting the frame and the reciprocating slat to fix the reciprocating slat so as to prevent vertical displacement of the reciprocating slat with respect to the fixed slat; first and second drive means provided and respectively coupled to said first and second reciprocating slats, the first and second reciprocating slats being provided and respectively coupled to said first and second reciprocating slats for driving said first and second reciprocating slats in a longitudinal direction of load transport simultaneously and in opposite slats; first and second drive means for independent movement in a retraction direction, each of the fixed slats and reciprocating slats having a longitudinally extending load engaging surface, the load engaging surface having a longitudinally extending load engaging surface; , a slat-type reciprocating conveyor that is always in the same longitudinally extending plane during conveyor operation. (2) a plurality of fixed slats extending in the vertical direction and arranged at intervals in the lateral direction of the frame, and first and second slats arranged between the fixed slats and alternately arranged in the width direction of the conveyor; a second reciprocating slat;
A slat type reciprocating conveyor according to claim 1, wherein the first reciprocating slat is connected to the first drive means and the second reciprocating slat is connected to the second drive means. (3) each first reciprocating slat is connected to a common first drive member connected to said first drive means, and each second
The reciprocating slats of are connected to a common second drive member connected to said second drive means, whereby actuation of either drive means moves the reciprocating slats connected thereto. The slat type reciprocating conveyor according to item (2). (4) Each of the first drive means and the second drive means consists of a double-acting piston-cylinder device, and each of the piston-cylinder devices is configured for simultaneous movement in the load conveying direction; , slat-type reciprocating conveyor according to claim 1, which are operable independently of each other for alternating movements in opposite slat retraction directions. (5) The slat type reciprocating conveyor according to claim 1, wherein the width of the load bearing surface of at least one of the fixed slats is smaller than the width of the load bearing surface of each reciprocating slat. (6) The slat type reciprocating conveyor according to claim (1), wherein the support means is made of a material with a small coefficient of friction. (7) The fixing means includes an elastic member integral with the support member, and has a shape such that a locking tab provided on each reciprocating slat engages with the fixing means, thereby causing the reciprocating slat to face upwardly. Claim (1) that prevents displacement.
The slat type reciprocating conveyor described in . 8. The slat-type reciprocating conveyor of claim 1, including a lateral extension in each fixed slat supporting said support means and said elastic member.