JPH11124040A - Handcarrier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify carrying work by engaging an engaged portion provided in the carrier body with an engaging portion provided at the side to which the load is transferred, positioning the carrier body relative to the position to which the load is transferred, and bringing the loading portion to the appropriate position. SOLUTION: In order to receive the load L from the point TP to which the load is transferred, the operator is expected to engage the engaging portion 4 at the point TP to which the load is transferred with the engaged portion 5 of the carrier V for positioning of the carrier body MP, and to operate the lifting handle 29 and the ratchet handle 40 so as to adjust the loading portion LH either at the upper stage or the lower stage to have the height for the load transfer. That is, adjustment is performed so that the loading surface of the roller conveyor RC of the point TP to which the load is transferred becomes as high as the loading surface of the idling conveyor 6. Therefore, the handcarrier allows the operator to manually carry even heavy load L easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand-operated load carrier for carrying a load while supporting the load on a load table.

[0002]

2. Description of the Related Art Conventionally, in the case of carrying a light load, such a hand-held load transporting trolley moves a trolley near a load transfer target, and moves the trolley to a loading table and a load transfer target. In the case where the operator manually transfers the load to and from the location, while the heavy load is conveyed, the electric type that transfers the load between the loading table and the load transfer target location is used. An automatic transfer device such as a manipulator or a slide fork mechanism is provided on the truck side.

[0003]

Therefore, in the above-mentioned conventional configuration, in the configuration in which the load is manually transferred, the load transfer operation can be easily performed by the human power of the operator, but the load transfer of the heavy load is performed by the operator. However, in the configuration in which the above-described automatic transfer device is provided on the truck side, the burden on the operator is reduced, but the manufacturing cost is increased. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to easily carry a load by a human operator while avoiding an increase in manufacturing cost even when a heavy load is carried. In that

[0004]

According to the first aspect of the present invention, the operation of transporting a load at a location to be transferred to another location to be transported by a hand-operated load carrier is generally performed. Can be performed manually by the operator. That is, the worker, when receiving a load from the load transfer target location, manually operating the lifting support mechanism as appropriate to adjust the height of the loading table to the height of the load transfer target location,
The bogie main body is moved to engage the engaged portion provided on the bogie main body with the engaging portion provided on the load transfer target side to position the bogie main body with respect to the load transfer target location. Operation to move the position of the loading table to an appropriate position for transferring a load to and from the load transfer target location.

[0005] In this state, the operator pushes or pulls the load at the load transfer target location to load the load onto the loading table of the hand-pushed transport vehicle while using the idle conveyor of the loading table. Move. When a load is loaded on the loading table, the operator pushes the hand-operated load carrier and moves to a target load transfer target location. When reaching the target load transfer target location, the positioning of the carriage main body portion and the height adjustment of the load mount are appropriately performed as described above, and the position of the load mount is transferred for transfer of the load with the load transfer target location. The load is moved to the loading table of the hand-held carrier by pushing or pulling the load at the load transfer target location.
As described above, when carrying the load by the manual operation of the worker, the lifting support mechanism for raising and lowering the loading table is provided with operation force reducing means for reducing the manual operation force of the worker, and the loading table is provided with An idle conveyor is provided for facilitating the transfer of the load to and from the load transfer target location. Therefore, even when transporting heavy loads, it is possible to avoid an increase in manufacturing costs due to the introduction of the automatic transfer device, and to provide a mechanism for assisting the load transfer operation while reducing the burden on the worker. A series of load transport operations can be easily performed by the human power of the operator.

[0006] With the configuration of the second aspect, a load can be loaded on a plurality of loading stages provided vertically and a load transfer operation can be performed. As a result, it is possible to save the space of the hand-operated load carrier, and also to adjust the height of each load table to a height suitable for transferring the load by the lifting support mechanism, even if the load is arranged vertically and transported. It is possible, and an increase in the work load of the worker can be avoided as much as possible. In addition, with the configuration according to the third aspect, the load is placed and transported on the idle conveyor provided on the loading table, but the load movement restricting means prevents the load from moving. In this state, the load can be stably conveyed by being conveyed in a state where the load is switched. In addition, since the loading table is supported by the vibration damping member by providing the configuration described in claim 4, damage to the load due to vibration during traveling can be prevented even when a precision component or the like that is vulnerable to vibration is conveyed. In particular, the psychological burden on the worker can be reduced.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a push-type load carrier of the present invention. As shown in FIG. 1, a manually-operated load transporting trolley V (hereinafter, may be simply referred to as a “trolley V”) supports a loading section LH in two upper and lower stages so as to be able to move up and down with respect to the trolley main body MP. In addition, the bogie main body MP is provided with a pair of idle wheels 1 serving as front wheels and a pair of caster wheels 2 serving as rear wheels in a state where the worker pushes and moves the bogie V. Is handle 3
, And pushes and moves the cart V to carry out the load transfer operation. Hereinafter, the front, rear, left, and right of each part of the truck V will be expressed based on the moving direction of the truck V.

As shown in FIGS. 1 and 2, the bogie main body MP is engaged with the engaging portion 4 provided on the load transfer target location TP side to move the bogie main body MP to the load transfer target location. The engaged portion 5 for positioning is formed. Engaged part 5
Is formed in a substantially trapezoidal shape in plan view, and the engaging portion 4 on the load transfer target location TP side has a shape adapted to the shape of the engaged portion 5 of the truck V. Note that, as the load transfer target location TP, for example, a load receiving unit or a load unloading unit of various processing apparatuses corresponds, and the cart V is used to transport a processing object between the respective processing apparatuses. .

Each of the two upper and lower loading sections LH has substantially the same configuration. The two upper and lower loading sections LH are connected by a vertical frame 24 to form a lifting support mechanism U, which will be described later.
D moves up and down together. Each of the loading sections LH is provided with a loading table 7 having an idle conveyor 6.
As shown in FIG. 3, the loading table 7 is attached to the frame 8 of the loading section LH, and thus to the cart body MP.
It is supported by a damping member 9 composed of four gel members. Therefore, the loading tables 7 are also provided in two upper and lower stages.
As shown in FIGS. 3 and 4, the idle conveyor 6 includes a series of flanged rollers 10 arranged on both left and right sides in the load transfer direction with respect to the load transfer target point TP, and a series of flanged rollers 10. It comprises a rubber belt 11 to be wound and a roller frame 12 rotatably supporting the flanged roller 10. The load L is placed on the idle conveyor 6 and transported. When the load L is transferred between the load portion LH and the load transfer target location TP, the operator pushes or pulls the load L to transfer the load L. The idle conveyor 6 idles to reduce the work load of the worker. The idle conveyor 6 is provided with the flanged roller 10 as described above, and the movement of the load L in the left-right direction is controlled by the flange portions of the pair of left and right flanged rollers 10.

Accordingly, the load L supported by the load table 7 can be moved in the load transfer direction with a relatively small force, and accordingly, the load movement for preventing the load L from moving during the load transfer. A regulating means LL is provided. The load movement restricting means LL is
As shown in FIG. 1, a movement preventing plate 13 is provided at the front end position of the loading portion LH so as to be capable of swinging and retreating. When the movement preventing plate 13 is at a position protruding upward, loading is performed. The load located above the lower end of the load L supported by the mounting table 7 and located between the movement preventing plate 13 at the upwardly protruding position and the pressing plate 14 located at the rear end of the load receiving portion LH. L is prevented from moving. The holding plate 14 is formed of a leaf spring member. When the movement preventing plate 13 projects upward, the movement preventing plate 13 and the holding plate 14
Thus, the load L is securely held.

A structure for swinging and retreating the movement preventing plate 13 will be briefly described. As shown in FIGS. 5 and 6, the movement preventing plate 13 is pivotally supported at its lower end by the frame 8 side of the loading portion LH, and has a pair of link members 15 near its central portion. And a pair of link members 15 pivotally supported so as to be swingable relative to one end side and the horizontal axis.
Are connected to each other by a pin 16 at the other end. A pin 16 for connecting the pair of link members 15 extends further through the pair of link members 15, and both ends of the free ends of the swing plates 17 a and 17 b are swingable relative to the horizontal axis. Is pivoted to. A pair of rocking plates 17a, 17
The swing base end side of b is connected by a swing shaft 17c, and the swing shaft 17c is supported by a support frame 18 so as to be swingable about a horizontal axis. The swing shaft 17c is directly connected to the mounting shaft 21 of the blocking plate swing knob 20 shown in FIG.

As a result, when the blocking plate rocking knob 20 is rocked, the rocking plates 17a and 17b are rocked.
As shown in (a) and (b), the movement preventing plate 13 is retracted downward (FIG. 5 (a)) to allow the movement of the load L from the loading table 7 to the load transfer target location TP. The state can be switched between a state in which the load L protrudes upward (FIG. 5B) and a state in which the movement of the load L on the load table 7 is prevented. The link member 15 has a curved concave portion 15a formed at an intermediate portion in the longitudinal direction thereof. When the movement preventing plate 13 is protruded upward, the curved concave portion 15a becomes a pair of swing plates 17a,
17b is engaged with the swing shaft 17c. In this state, by forming the link member 15 with the curved concave portion 15a, etc., the positional relationship of each connection point of the link mechanism constituted by the link member 15 and the like moves from the load L to the movement preventing plate 13. The movement preventing plate 13 is arranged so as to maintain the posture in which the movement preventing plate 13 protrudes upward even when a force acts in a direction for swinging the blocking plate 13 downward. Also, link member 1
5, a bulging portion 15b is formed as shown in FIG. 5, and when the movement preventing plate 13 is reciprocated downward and oscillated,
As shown in FIG.
The movement prevention plate 13 is prevented from swinging excessively downward by contact with the support member 15c on the side.

Next, a description will be given of a lifting support mechanism UD for integrally lifting and lowering the two upper and lower loading stages LH. Loading section L
As shown in FIGS. 7 and 8, H is fixedly supported by a pair of left and right mounting arms fixed to a lifting frame 25 on which a guide roller 25a is guided by a lifting guide rail (not shown). Ascend and descend together. The elevating frame 25 is suspended and supported by a wire 26, and the wire 26 is driven to be wound or sent out with the rotation of a wire winding reel 27 shown in FIGS. When the lifting frame 25 is located at the lowermost position as shown in FIGS. 7 and 8, the lifting frame 2 is received by the damper 50 fixedly installed at the lowermost position of the lifting path of the lifting frame 25 and descends.
The lower impact of the damping member 5 is absorbed by the lower surface of the damper 50 being brought into contact with the receiving member 50a of the damper 50 which is urged upward. In addition, the lifting frame 25 is suspended and supported by a pair of left and right constant load spiral springs 46, thereby reducing the burden on the operator who lifts and lowers the loading section LH.

The wire take-up reel 27 is fixedly connected to a first gear 28, as shown in FIGS. 9 and 10, and the first gear 28 is fixed to a rotating shaft of a lifting operation handle 29 shown in FIG. While meshing with the connected second gear 30,
The third gear 33 is fixedly connected to the rotation shaft of the rotary damper 32. The rotation shaft of the second gear 30 is further interlocked with a gear 31 constituting a ratchet mechanism,
When the operator rotates the lifting operation handle 29,
The first gear 28 and the second gear 30 rotate in conjunction with each other, and the lifting frame 2
5 is raised and lowered. At this time, the first gear 28 and the second gear 3
The gear ratio to 0 is set so as to reduce the force required for the operator to turn the raising / lowering operation handle 29. The first gear 28 and the second gear 30 and the pair of left and right constants described above are set. The load spiral spring 46 is a main part, and constitutes an operation force reducing means LM for reducing the manual operation force of the operator.

The ratchet mechanism provided with the gear 31 described above usually has a loading portion LH
The rotation of the gears 28 and 30 toward the lower side of the lifting frame 25 is performed by allowing the teeth of the gear 31 to swing.
4 is for blocking by engagement. In order to lower the lifting frame 25, it is necessary to release the engagement between the gear 31 and the rocking claw 34.
A rocking plate 36 fixedly connected to the rocking shaft 35 of No. 4; a rod 37 having one end engaged with the free end side of the rocking plate 36 to transmit an operating force for rocking the rocking plate 36; A swing bracket 38 having an elongated hole 38a with which the other end of the rod 37 is engaged.
And the swing shaft 3 to which the swing bracket 38 is attached and fixed.
9, a ratchet handle 40 for rotating the swing shaft 38, and a spring for returning the bias bracket 38 to a swing position on the side where the gear 31 and the swing claw 34 engage. 41 are provided. Therefore, the worker
To raise the loading section LH, simply rotate the raising / lowering operation handle 29 upward (the state shown in FIG. 9A), and to lower the loading section LH, operate the ratchet handle 40. While releasing the engagement between the gear 31 and the swinging pawl 34, the lifting operation handle 29 is rotated downward (the state shown in FIG. 9B).

Next, the work of transporting a load between the load transfer target locations TP will be schematically described. First, the load L is transferred to the transfer target location T.
When receiving from the P, the worker is required to
The bogie main body MP is positioned by engaging the engaging portion 4 on the P side with the engaged portion 5 of the bogie V, and the lifting operation handle 29
By operating the ratchet handle 40 as appropriate, the height of one of the upper and lower loading sections LH is adjusted to be the height for loading and transferring. Specifically, the loading surface of the roller conveyor RC provided at the load transfer target location TP and the loading surface of the idle conveyor 6 are adjusted to be at the same height. In this state, the operator pushes and moves the load L on the roller conveyor RC at the load transfer target location TP onto the idle conveyor 6 of the loading table 7, and operates the blocking plate swing knob 20 to move the load L. The transfer operation is completed by protruding the blocking plate 13 upward.

Thereafter, the carriage V is moved to the target transfer target location TP.
Is moved, and the engaging portion 4 on the side of the load transfer target point TP and the carriage V
The truck body MP is positioned by engaging the engaged portion 5 of the vehicle, and the lifting / lowering operation handle 29 and the ratchet handle 40 are appropriately operated so that either the upper or lower loading section LH is loaded. Adjust to the height for transfer. In this state, the operator operates the blocking plate swing knob 20 to retreat the movement blocking plate 13 downward, and transfers the load L on the idle conveyor 6 of the loading table 7 to the load transfer target location. TP
On the roller conveyor RC, and the transfer operation is completed. On the side of the load transfer target point TP receiving the load L, the roller conveyor RC descends together with the load L, and the positioning hole provided on the lower surface side of the load L and the positioning provided at the load transfer target point TP. The pin L is engaged to position the load L.

[Other Embodiments] Hereinafter, other embodiments will be listed. In the above embodiment, the case where the loading tables 7 are provided in two upper and lower stages is illustrated, but only one stage may be provided, or three or more stages may be provided. In the above-described embodiment, the idle conveyor 6 for delivering the load L is mainly composed of the flanged roller 10 and the rubber belt 11. It may be constituted by a simple roller conveyor or the like. For example, as shown in FIGS. 11 and 12, idler rollers 55 that are arranged in series on the left and right sides in the load transfer direction with respect to the load transfer target location TP, and a roller frame 56 that rotatably supports the idler rollers 55. And a pair of left and right guides 57 disposed on a cover 56 a forming a part of the roller frame 56 to guide the load L. In the example shown in FIGS. 11 and 12, a pair of left and right arms 58 for preventing the load L from falling over is provided in a state where the arms 58 are fixed to the frame 8 side of the load receiver LH.

In the above embodiment, the lifting support mechanism U
D, the lifting frame 25 is suspended and supported by the wire 25, and the wire 26 is wound and driven to be raised and lowered,
Further, the operating force reducing means LM is constituted by a constant load spiral spring 46 for suspending and supporting the lifting frame 25,
The lifting support mechanism UD and the operating force reducing means LM may be configured so that the frame 6 of the loading portion LH is moved up and down by a so-called ball screw mechanism. In the above embodiment, the movement restricting means LL is constituted by the movement preventing plate 13 swinging up and down as a main part. For example, the loading section LH is provided with a positioning pin which can be moved up and down, and The position may be configured to engage with the engaged portion formed on the load L to prevent the load L from moving. In the above-described embodiment, the engaging portion 4 of the load transfer target location TP for positioning the bogie main body portion MP is a trapezoidal concave portion in a plan view.
The specific shape can be variously changed. In the above embodiment, the upper and lower two stages of the loading tables 7 are integrally moved up and down, but they may be independently moved up and down.

[Brief description of the drawings]

FIG. 1 is a side view of a hand-operated load carrier according to an embodiment of the present invention.

FIG. 2 is a plan view of a push-type load transporting truck according to the embodiment of the present invention.

FIG. 3 is a side view of a main part according to the embodiment of the present invention;

FIG. 4 is a plan view of a main part according to the embodiment of the present invention.

FIG. 5 is a side view of a main part according to the embodiment of the present invention.

FIG. 6 is a plan view of a main part according to the embodiment of the present invention;

FIG. 7 is a side view of a main part according to the embodiment of the present invention.

FIG. 8 is a front view of a main part according to the embodiment of the present invention.

FIG. 9 is a front view of a main part according to the embodiment of the present invention.

FIG. 10 is a plan view of a main part according to the embodiment of the present invention.

FIG. 11 is a sectional view of a main part according to another embodiment of the present invention.

FIG. 12 is a perspective view of a main part according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 4 Engagement part 5 Engagement part 6 Idle type conveyor 7 Loading table 9 Vibration suppression member LL Movement restriction means LM Operation force reduction means MP Bogie main body UD Elevating support mechanism

Claims (4)

[Claims] 1. An engaged portion to be engaged with an engaging portion provided on a load transfer target position side and a load to be conveyed placed and supported in order to position the bogie main body portion at the load transfer target position. And a loading table provided with an idle conveyor for manually transferring the load to and from the load transfer target location, and the loading table is supported on the bogie body so as to be able to move up and down, and
A hand-operated load carrier having a lifting and lowering mechanism that is lifted and lowered by a manual operation force and includes an operation force reducing unit that reduces the manual operation force. 2. The hand-operated load according to claim 1, wherein said loading table is provided in a plurality of stages vertically, and said plurality of stages of loading tables are integrally lifted and lowered by said lifting support mechanism. Transport trolley. 3. The apparatus according to claim 1, further comprising a load movement restricting means which is capable of switching between a state in which the movement of the load from the loading table to the load transfer target position is permitted and a state in which the movement is prevented. Hand-operated load transport trolley. 4. The hand-held transfer vehicle according to claim 1, wherein the loading table is supported by the carriage main body by a vibration damping member.