JPH10181419A - Wire protecting tube for slide storing type lifter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent grease on the wire surface from sticking on a worker or a cargo by covering the outer circumference of the wire, which is positioned between a runner side and a platform when the platform is being used, with a tube. SOLUTION: This slide storing type lifter, which is of a composition that a wire 6 is drawn out from a runner side 3 through a pulley by means of a platform 10 being slid from a stored condition to an using condition, is equipped with a tube bracket 50 fitted so that it may rotationally move in coaxial line with a rotary supporting shaft 67a of a pulley 6 with respect to the runner 3, and a tube 50 having its upper end connected to the tube bracket 50 and capable of covering the outer circumference of the wire 6, which is positioned between the runner 3 side and the platform 10 when the platform 10 is in the using condition, in its total length.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire protection tube of a slide retractable lifter which is used mainly for loading and unloading cargo on a cargo carrier.

[0002]

2. Description of the Related Art Conventionally, in a slide retractable lifter of this type, a platform capable of sliding from a state of being stored on the carrier side of a vehicle to a use state protruding outside of the carrier is supported substantially horizontally by wires. It has become. The wire is pulled out from the side of the runner incorporated in the column of the loading platform by sliding the platform from its storage state to the use state, and conversely, by sliding the platform from its use state to the storage state. It is configured to be drawn toward the side. Grease for preventing rust is applied to the outer periphery of the wire, but the outer periphery of the wire is covered with a tube except for a portion which is drawn into the runner when the platform is stored.

[0003]

However, in the use state of the platform, since the wire of the portion pulled out from the runner side is exposed from the tube, when a worker or a load comes into contact with the exposed portion of the wire. Grease adheres to them.

An object of the present invention is to cover the outer periphery of a wire located between a runner side and the platform with a tube over the entire length of the wire when the platform is used, and to coat the surface of the wire with the tube. To prevent grease and the like from sticking to workers and cargo.

The object of the invention according to claims 2 and 3 is that, in addition to the above-mentioned objects, the wire is pulled out from the runner side or conversely drawn into the runner side as the platform slides. To allow the tube to expand and contract smoothly.

[0006]

According to the first aspect of the present invention,
This platform is placed almost horizontally between a platform that can be slid from a state stored on the bed side to a use state that extends substantially horizontally to the outside of the bed and a runner incorporated in the column of the bed. When the platform is slid from its retracted state to a used state, the wire is pulled out from the runner side via a pulley provided on the runner, and conversely, the platform is Is a slide retractable lifter configured such that an excess amount of the wire when it is slid from its use state to the retracted state is drawn toward the runner, wherein the lifter rotates around a coaxial line with a rotation support shaft of the pulley with respect to the runner. Tube bracket that is mounted to move It is, and is characterized in that it comprises a tube which can be covered over its entire length an outer periphery of the wire located between the runner side and the platform in the use state of the platform.

According to the first aspect of the present invention, the tube rotates together with the tube bracket around the rotation axis of the pulley in response to the deflection of the wire caused by the slide of the platform. Therefore, even when this tube covers the entire circumference of the wire located between the runner side and the platform when using the platform over its entire length, it does not hinder the slide of the platform or the movement of the wire. This prevents grease applied to the wire from sticking to workers and cargo.

According to a second aspect of the present invention, there is provided a wire protection tube for a slide retractable lifter according to the first aspect,
The tube is divided into a plurality of tubes having different diameters with respect to the length direction, and the divided tubes are set in a relationship between the outer tube and the inner tube which can enter into each other. It is characterized by.

According to a third aspect of the present invention, there is provided a wire protection tube for a slide retractable lifter according to the second aspect,
The divided tubes are set in a relationship between an outer tube and an inner tube from a tube bracket side to a platform side.

According to the second and third aspects of the present invention, the wire is pulled out from the runner side with the slide of the platform, or conversely, by the operation of the inner tube entering or leaving the outer tube. The tube expands and contracts smoothly with respect to the movement of being pulled into the side.

[0011]

Embodiments of the present invention will be described below. FIG. 1 is an external perspective view of a cargo vehicle provided with a slide retractable lifter. The platform 10 shown in this drawing is adapted to move up and down along respective columns 2 arranged on the left and right of the rear opening of the vehicle carrier 1 by a lifting device 60 described below. In other words, the platform 10 can be moved up and down between a height substantially coinciding with the floor surface of the loading platform 1 and a height substantially in contact with the ground, and a height slightly lower than the floor surface of the loading platform 1 (hereinafter, referred to as the platform 1).
By sliding the vehicle toward the front side of the vehicle at “storage height”, the vehicle can be stored in the storage room V formed under the floor of the luggage carrier 1.

FIG. 2 is a side view showing the slide retractable lifter in partial cross section, and FIG. 3 is a perspective view showing the lower portion of the lifter. As is apparent from these drawings, runners 3 are respectively incorporated in the two columns 2 so as to be vertically movable. Runner plates 4 are attached to the lower ends of these runners 3, respectively, and a connecting member 5 is provided between the runner plates 4 in a state of being bridged therebetween. The two runners 3 are integrally lifted and lowered by using a hydraulic cylinder 61 shown in FIG. 2 as a drive source.
Is configured.

The platform 10 is slid from a state stored in the storage room V to a use state in which the platform 10 extends substantially horizontally to the outside of the carrier (rear side of the vehicle).
The front edge of the platform 10 rests on the connecting member 5 as shown in FIGS. In this state, the platform 10 is supported substantially horizontally by respective wires 6 connected to both rear corners thereof.
Here, by raising and lowering the two runners 3 by the lifting and lowering device 60, the platform 10 is raised and lowered through the connecting member 5 while being kept substantially horizontal. FIG. 1 shows a state in which the platform 10 is lowered to a position where the platform 10 is almost in contact with the ground.

As shown in FIG. 2, the hydraulic cylinder 61, which is a driving source of the lifting device 60, is incorporated in the step portion of the loading platform 1. Two rod sprockets (not shown) are provided at the rod end of the hydraulic cylinder 61. ) Is attached. As shown in FIG. 2, chains 62 respectively guided to the two columns 2 via sprockets 64 arranged at the upper ends of the left and right columns 2 are individually hung on these sprockets. The base ends of these chains 62 are fixed to the step portion, and the two chains 62 are individually pulled by moving the two sprockets by the hydraulic cylinder 61,
It has become loosened. Since the left and right columns 2 have the same internal configuration, only one side will be described.

FIG. 4 is an external perspective view of the runner 3. As is clear from this drawing, the tip of the chain 62 guided into the column 2 is connected to the plate 65 at the upper part of the runner 3. A spindle 6 fixed to the lower end of the plate 65
One end of the wire 6 is connected to 5b. The wire 6 is wrapped around a lower pulley 66 and an upper pulley 67 provided inside the runner 3 in this order, and then pulled out of the column 2 to be pulled out of the platform 1.
0 is connected to a rear end corner portion by a coupling metal fitting 7 (FIGS. 2 and 3).

The support shaft 65b of the plate 65 is inserted into a long hole 3a formed on the side wall of the runner 3. The support shaft 67a of the upper pulley 67 is
Are rotatably supported on both side walls of the runner 3 through a long hole 65a formed in the hole. For this reason, the plate 65
The support shaft 65b can move up and down with respect to the runner 3 within a range in which the support shaft 65b can move in the long hole 3a. However, since the support shaft 67a of the upper pulley 67 can move relatively to the long hole 65a of the plate 65, the pulley 67 does not move even if the plate 65 moves.

The support shaft 66a of the lower pulley 66 is inserted into an elongated hole 3b formed on both side walls of the runner 3,
The lower pulley 66 is also vertically displaceable relative to the runner 3 within a range in which the support shaft 66a can move in the elongated hole 3b. However, the lower pulley 66 is urged downward by a tension spring 69 via a U-shaped bracket 68. The lower end of the tension spring 69 is hooked on a plate 70 fixed to the runner 3. A plurality of guide rollers 71 are attached to the runner 3, and the runner 3 smoothly rotates the inside of the column 2 in the vertical direction while rotating the guide rollers 71 along the inner wall surface of the column 2. Will move.

The hydraulic cylinder 6 in the lifting device 60
When the chain 62 is pulled downward by the operation of 1, the plate 65 moves upward. When the plate 65 moves upward, the support shaft 65b is inserted into the elongated hole 3a.
, And the pulley 66 is connected to the tension spring 6.
The support shaft 66a moves upward while opposing the force of No. 9 and the upper end of the long hole 3b abuts. Thereafter, the plate 65 and the runner 3 move upward integrally, whereby the platform 10 is raised. Conversely, when the tension on the chain 62 is released by the operation of the hydraulic cylinder 61, the runner 3 is lowered by its own weight, the platform 10, the load, and other loads.

When the platform 10 descends until the lower end of the runner 3 comes in contact with the ground, the end of the platform 10 immediately after that on the vehicle rear side is in a state of floating above the ground. However, after that, the plate 65 is
As the wire 6 moves further downward along the line a, the wire 6 is loosened, and the rear end of the platform 10 swings downward by its own weight to be grounded. Therefore, as a result, the platform 10 is inclined backward and downward,
Loading of the cargo on the platform 10 or unloading from the platform 10 can be facilitated.

The platform 10 has a substantially rectangular shape, and a plurality of guide rollers 12 are provided at the front end of the storage chamber V as shown in FIG.
The storage room V is provided with guide rails 25 and 27 for guiding the slide of the platform 10 at the center and both sides thereof. Platform 10
At the rear end, as shown in FIGS.
a is provided rotatably. This auxiliary plate 10
a can be rotated from a stored state superimposed on the upper surface of the platform 10 to a use state indicated by a virtual line in FIG. 3, and in this use state, plays a role of absorbing a step between the platform 10 and the ground. (FIG. 1).

At the center of the platform 10 in the vehicle width direction, a slit 11 is provided to escape the central guide rail 25 when the platform 10 is stored in the storage room V. In the center of the auxiliary plate 10a, the groove 1 corresponding to the slit 11 is also provided.
0b is formed so that a part of the slit 11 is not closed by the auxiliary plate 10a when the auxiliary plate 10a is stored on the upper surface of the platform 10.

When the platform 10 is slid from the state of being stored in the storage room V to the state of use, the wires 6 are pulled. This allows the pulley 6
6 moves upward in the range of the elongated hole 3b while opposing the force of the tension spring 69, and as a result, the wire 6
Is pulled out from the runner 3 side. Conversely, when the platform 10 is slid in the direction of storing in the storage room V at the above-mentioned “storage height” shown in FIGS. 2 and 3, the wires 6 are loosened. As a result, the pulley 66 is moved downward by the force of the tension spring 69, and the wire 6 is pulled toward the runner 3 to absorb the surplus of the wire 6.

The outer periphery of the wire 6 pulled out from the side of the runner 3 is covered with a tube 50. Therefore, the support structure of the tube 50 will be described.

FIG. 5 is an enlarged structural view of the upper part of the runner 3, and FIG. 6 is a sectional view taken along line AA of FIG. As apparent from these drawings, the runner 3 is provided with a tube bracket 40 coaxially with the pulley 67. The tube bracket 40 is formed by bending a plate-like material into a substantially U-shape, and its upper and lower surfaces and one end surface are open.
That is, the tube bracket 40 has a configuration in which the support portion 42 on the open end surface side and the connecting portion 44 on the closed end surface side are provided.

The support portion 42 of the tube bracket 40
Is mounted so as to sandwich the pulley 67 from both sides thereof, and is rotatably supported on a support shaft 67a of the pulley 67. The plate 65 is located outside the support section 42 (FIG. 6). On the other hand, a through hole 45 is formed in the front wall 44a of the connecting portion 44, and the wire 6 is guided from the pulley 67 to the platform 10 through the through hole 45.

As is apparent from FIG.
Is divided into an outer tube 52 on the side of the runner 3 (upper side) and an inner tube 54 on the side of the platform 10 (lower side) in the length direction. The outer tube 52 is set to an inside diameter into which the inner tube 54 can enter. 5 and 6, the upper end of the outer tube 52 is inserted into the through hole 45 of the connecting portion 44 of the tube bracket 40, and is connected to the connecting portion 44 by any means. On the other hand, the inner tube 54 merely covers the outer peripheral surface of the wire 6.

As is apparent from FIG. 2, the outer tube 52 and the inner tube 54 are connected to the platform 1
0 in the use state, the column 2 from the runner 3 side.
Over the entire length of the wire 6 drawn out of the wire. Moreover, in this state, the lower end of the outer tube 52 and the upper end of the inner tube 54 overlap each other within a certain range, and the wire 6 may be exposed from between the outer tube 52 and the inner tube 54 by any chance. It is considered not to be.

By sliding the platform 10 from the storage room V to the use state or from the use state to the storage room V, the wire 6 is pulled out from the runner 3 side as described above. Or, conversely, it is drawn into the runner 3 side.
At the same time, the wire 6 swings in the range indicated by the solid line and the imaginary line in FIG. 5 as the platform 10 slides. The pulling out and pulling in of the wire 6 from the side of the runner 3 is dealt with by the operation of the inner tube 54 entering or leaving the outer tube 52.

When the wire 6 swings, the tube bracket 40 follows the support shaft 6.
It is dealt with by rotating around the axis of 7a. Therefore, even if the tube 50 covers the outer periphery of the wire 6 pulled out from the side of the runner 3 during use of the platform 10 over its entire length, it does not hinder the slide of the platform 10 or the movement of the wire 6. Does not affect. The tube 50
Is not limited to two, and may be divided into three or more while maintaining the relationship between the outer tube and the inner tube.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a cargo vehicle provided with a slide retractable lifter.

FIG. 2 is a side view showing a slide retractable lifter in a partial cross section.

FIG. 3 is a perspective view showing a lower portion of the slide retractable lifter.

FIG. 4 is an external perspective view showing a runner.

FIG. 5 is an enlarged configuration view of an upper part of a runner.

FIG. 6 is a sectional view taken along line AA of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Loading bed 2 Column 3 Runner 6 Wire 10 Platform 40 Tube bracket 50 Tube 52 Outer tube 54 Inner tube 67 Pulley 67a Support shaft

Claims (3)

[Claims] 1. A platform, which can be slid from a state stored on a bed side to a use state extended substantially horizontally to the outside of a bed, and a runner incorporated in a column of the bed, A wire for supporting the platform substantially horizontally is stretched. When the platform is slid from its retracted state to a used state, the wire is pulled out from the runner side via a pulley provided on the runner. Conversely, when the platform is slid from its use state to the storage state, a surplus of the wire is pulled into the runner side, and is a slide retractable lifter, wherein the rotation support shaft of the pulley with respect to the runner and A tube bracket mounted to rotate about a coaxial line and this tube bracket The upper end portion is coupled to,
And a tube capable of covering the entire circumference of a wire located between the runner and the platform when the platform is in use, over the entire length thereof. 2. The wire protection tube for a slide retractable lifter according to claim 1, wherein the tube is divided into a plurality of tubes having different diameters in a length direction thereof, and the divided tubes are divided into tubes. A wire protection tube for a retractable slide type lifter, wherein the outer tube and the inner tube that can penetrate into the outer tube are set to each other. 3. The wire protection tube of a slide retractable lifter according to claim 2, wherein the divided tubes are set in a relationship between an outer tube and an inner tube from a tube bracket side to a platform side. A wire protection tube for a slide retractable lifter, which is characterized in that: