JPH07165083A - Hand truck - Google Patents

Abstract

PURPOSE:To load/unload an article onto/from a hand truck without manual operation by loading a car body main body of a hand truck with an article transferring device for moving an article in the horizontal direction and vertical direction. CONSTITUTION:An operation box 65 for operating a hand grip 64 and an electric equipment is provided in the near part of a car body main body 63 of a hand truck 62 provided with an appropriate number of casters in the bottom part thereof. A hollow elevating stand, which is elevated by an elevating device through an elevating rod, is provided at a central part of the top of the car body main body 63, and a slide fork 3, which can be slid right and left by a sliding device, is provided in the elevating stand. A load receiver platform 31 formed with a cross-like positioning groove 32 is fixed to the top surface of the slide fork 3, and a load carrying platform 82 is provided on the top of the car body main body 63 to form the load carrying platform 82. Supporting blocks 87 respectively provided with a step-down part, in which the bottom part of a carrying case is fitted, is fitted to the upper end of the four supports 84 connected to each other by connecting members 85.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand truck.

[0002]

Disadvantages of the prior art Although the conventional hand cart has the advantage that it is simple and inexpensive as a means for transporting articles, it does not require manual labor when loading or unloading articles on the hand cart. It had the drawback of having to bother you.

[0003]

[Means for Solving the Disadvantages] The present invention adopts the following means in order to eliminate the above disadvantages. In the present invention, an article transfer device for moving articles horizontally and vertically is mounted on a vehicle body.

[0004]

The present invention has the following functions. The article transfer device can place an article on the hand truck or unload the article from the hand truck without the need for human labor.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on two embodiments shown in the drawings. In these examples, the same members are designated by the same reference numerals.

Embodiment 1 (see FIGS. 1 to 10) In this Embodiment 1, the front means the upper side of FIG. 1, the rear means the lower side of FIG. 1, the left means the left side of FIG. 1 and the right means the same. Refers to the right side of the figure.

As shown in FIGS. 1 and 2, the hand cart 6 is provided.
At the rear part of the body body 63 of No. 2, an operation box 65 is provided which is provided with a push handle 64 and switches for operating electric devices and the like which will be described later.

A required number of turning casters 67 are provided below the vehicle body 63.

At the center of the upper portion of the vehicle body 63, an elevating rod 69 is vertically movable by, for example, spline connection so as not to rotate horizontally with respect to the vehicle body 63. The lifting rod 69 can be lifted and lowered by a lifting device 70 as shown in FIG. The lifting device 70 includes a gear 73 that meshes with a gear 72 that is fitted to a horizontal rotation shaft of a motor 71 that can rotate forward and backward.
A roller 74 is rotatably provided around the side surface of the gear 73, and the roller 74 is fitted in the horizontal groove 76 of the driven member 75 without vertical play.
Is attached to the lower end of the lifting rod 69. With such a configuration, the driven member 75 (elevating rod 69) can be moved up and down by rotating the gear 73 and changing the height position of the roller 74.

As shown in FIGS. 4 to 8, a hollow elevator 78 is provided on an upper part of the elevating rod 69 projecting upward from an upper part of the vehicle body 63, with its longitudinal direction oriented in the left-right direction. The slide fork 3 is slidably mounted on the lift table 78 by a sliding device 79, which will be described in detail later. In addition, with the transport case 41 placed on the slide fork 3, the slide fork 3 (the lift table 7
In order to reduce the load applied to the motor 71 when 8) rises, the driven member 75 is always urged upward by an upward urging device (not shown) using hydraulic pressure, a spring or the like.

The sliding device 79 has a base 1 and a middle 2 fixed to an elevating table 78, and a sliding motor 4 for the middle 2 is provided below the base 1.

The base 1 has a U-shaped cross section having standing wall portions 5 on the front and rear sides (on both the left and right sides in FIG. 5). The standing wall portions 5 and 5 face each other in the left-right direction (see FIG. 5). A plurality of guide rollers 6 are rotatably held at predetermined intervals in a direction (perpendicular to the paper surface of FIG. Reference numeral 7 is the fixing nut. The middle 2 holds two rail members 8 having an E-shaped cross section in parallel by a connecting plate 9 so that the longitudinal direction thereof is oriented in the left-right direction. The guide rollers 6 of the base 1 are fitted into the grooves 10 and 10 formed on the outward surfaces of the rail members 8 and 8, respectively. The slide fork 3 is provided with hanging wall portions 12 and 12 in parallel with the respective facing inner surfaces of the rail members 8 of the middle 2, and the hanging wall portions 12 and 12 are provided at the opposite outward positions. The plurality of guide rollers 13 are rotatably held at predetermined intervals in the left-right direction. These guide rollers 13 are
The rail members 8, 8 of the middle 2 are fitted in the grooves 11, 11 formed on the inner surfaces facing each other. In this way, the middle 2 is guided with respect to the base 1 and the slide fork 3 is guided with respect to the middle 2 so as to slide laterally.

By sliding the middle 2 to the right or left, the slide fork 3 is also interlocked to slide in the same direction. The mechanism is as follows.
That is, as shown in FIGS. 7A and 7B, a pair of left and right rotatable wheels 54 and 55 provided on the middle 2 and a left side fixed end 56 of the slide fork 3 are connected to the right side wheel 54 of the middle 2. Through the left-side fixed end 57 of the base 1 via the right-moving interlocking chain 58, and the right-side fixed end 59 of the slide fork 3 through the left-side wheel 55 of the middle 2 through the right-side fixed end of the base 1. It has a left-moving interlocking chain 61 hung over 60. The reason why the right-hand movement interlocking chain 58 and the left-hand movement interlocking chain 61 are hooked as described above is to double the interlocking amount of the slide fork 3 with respect to the sliding amount of the middle 2.

As shown in FIG. 6, the base 1 is provided with a pair of left and right rotatable wheels 20 and 21. The right wheel 20 and the left wheel 21 have a sprocket 23 that rotates forward or backward by the motor 4 and an endless belt 22 that uses a chain or the like. Reference numerals 24 and 24 denote rotatable wheels for applying tension to the endless belt 22. Between the right wheel 20 and the left wheel 21, mutual interference is prevented when the upper portion 22a and the lower portion 22b of the endless belt 22 pass vertically, and the upper portion 22a is A rubbing plate 25 is provided to raise the left wheels 20 and 21 slightly higher than the height of the addendum. When the endless belt 22 is a chain, a large number of pins for connecting the links to each other are provided along the carrying direction, and the pins function as an engaging portion described later. However, when an endless belt 22 other than a chain is to be used, it is necessary that the endless belt 22 be provided with a large number of engaging portions instead of such pins.

The connecting plate 9 of the middle 2 has a short rack-shaped engaging piece 28 penetrating from the upper surface portion to the lower portion thereof.
(See FIG. 5) are provided. The engagement pieces 28 are arranged such that one center piece in the left-right direction of the middle 2 and one piece (three pieces in total) are arranged on the left and right sides of the middle piece at predetermined intervals. The upper portion 22a that rides on the upper portion 25 engages with the engaging portion (corresponding to the pin in the case of the chain as described above) of the endless band 22. Therefore, when the endless belt 22 is driven and driven, the engagement piece 28 (middle 2) can be slid in the same direction as the sliding direction (for example, rightward) of the upper portion 22a. ,
At the time when the engagement piece 28 is sent to the right further than the corresponding area of the rubbing plate 25, the engagement piece 28 arranged on the left side enters the corresponding area of the rubbing plate 25 and engages with the endless band 22. After all, the middle 2 is always the endless belt 22
The state in which the drive is transmitted from is maintained.

In the above embodiment, the engaging piece 28 has a short rack shape having a plurality of engaging teeth, but if the number of arrangements for the middle 2 is increased, only one engaging tooth is provided. It may be something like On the contrary, by increasing the number of engaging teeth, it is possible to form one long rack shape corresponding to the left-right length of the middle 2. Further, the drive transmission of the motor 4 to the endless belt 22 does not need to use the sprocket 23,
It may be directly carried out by the right and left wheels 20, 21 and the tensioning wheel 24. A torque limiter 30 (see FIG. 5) is preferably attached to the rotation shaft of the motor 4 in order to prevent damage to the motor 4, the endless belt 22, and other parts during overload.
When a chain is used as the endless belt 22, it is preferable to use a roller chain so that engagement and disengagement with the engagement piece 28 can be smoothly performed.

With the above structure, the following operations are performed. By driving the motor 4, the endless belt 22 is driven and travels via the sprocket 23, so that the engagement piece 28 engaged with the upper portion 22a on the rubbing plate 25 is slid in the endless belt 22. Thus, the middle 2 slides on the base 1. Further, as the middle 2 slides, the slide fork 3 slides in the same direction as the middle 2.

As shown in FIG. 8, on the upper surface of the slide fork 3, a load receiving base 31 having a cross positioning groove 32 is fixed. The side surface of the positioning groove 32 is a tapered surface that opens upward so that the cross-shaped positioning protrusion 42 formed on the lower surface of the transport case 41 can be smoothly fitted.

As shown in FIG. 9, a cargo bed 82 is provided on the upper portion of the vehicle body 63. The loading platform 82 has four columns 84 that are erected on the vehicle body 63 via a shock absorber 83 that uses air, springs, etc.
4 are mutually connected by a connecting member 85. A support block 87 having a step-down portion 88 into which the bottom corner of the carrying case 41 is fitted is attached to the upper end of the pillar 84. In addition, the carrying case 41 is attached to the support block 87.
The sole side opening 43 is placed so as to face the unloading table 93, which will be described later, and in this state, the height position of the step drop portion 88 is adjusted so that the side opening 43 faces slightly upward. Has been done. In addition, the transport case 41
The side wall having an L-shaped planar shape surrounding the stepped-down portion 88 is widened upward so that the side wall can be positioned on the support block 87. Further, the carrying case 41 is placed on the stepped-down portion 88 of the support block 87, and its position is regulated by the support block 87 so as not to move in the horizontal direction. The transport case 41 contains components that require cleanliness. The support block 87, the pillar 8
It goes without saying that the 4 and the like do not collide with or buffer the slide fork 3 and the like. Further, the load receiving table 31 of the slide fork 3 is configured so as not to collide with the transport case 41 on the support block 87 in the lowered state, while the transport case 41 is lifted above the upper surface of the support block 87 in the raised state. Is made possible. With the above-described configuration, the slide fork 3 is configured so that the carrying case 41 projects downwardly and moves up and down.
Lifting / lifting the transport case 41 by raising 8
It is possible to lower the transport case 41 to the support block 87 by performing an operation of retreating to the side and lowering the elevating table 78, and to lower the transport case 41 to a predetermined position by the operation reverse to the above.

As shown in FIGS. 1 and 10, an unloading table 93 is provided on the right side of the stop station 91, and the unloading table 93 is provided with the unloading table 93 when the carrying case 41 is unloaded.
A recess 94 is formed for the slide fork 3 to sink. The depth of the depression 94 is equal to that of the slide fork 3
The depth is set to allow the slide fork 3 to sink so that the upper surface of the load receiving base 31 does not contact the lower surface of the transport case 41. The articles in the transport case 41 unloaded on the unloading table 93 are, for example, robots (not shown).
Be carried out by.

As shown in FIGS. 1 and 2, a hand truck 6 is provided.
2 has a clean unit 97 for cleanly holding the transport case 41 on the support block 87.
The clean unit 97 is provided at the inlet 99 and a duct 98 having an outlet 100 facing the carrying case 41 on the support block 87, a blower 101 having a jet outlet connected to the inlet 99, and the inlet 99 and the outlet 100. And a filter 102. With this configuration,
The transport case 41 on the support block 87 can be held clean by the clean air ejected from the outlet 100.

As shown in FIGS. 1 and 2, a hand truck 6 is provided.
Two positioning devices 106 are provided. The positioning device 106 has a first positioner 107 and a second positioner 113. The first positioner 107
Is a roller 108 attached to the front right side of the hand cart 62 so as to be rotatable with its axis oriented in the up-down direction and adjustable in horizontal position (front-rear, left-right position);
It has a receiving block 109 having a planar V-shaped notch 110 into which the roller 108 is fitted, which is provided on the floor surface of the stop station 91 so as to be adjustable in the horizontal position (front, rear, left and right positions). The second positioner 113
Is a guide cylinder 114, which is attached to the rear right side of the hand truck 62 so that its axial center is oriented in the vertical direction and is adjustable in the horizontal position (positions in the front, rear, left, and right), and the guide cylinder 114.
And a tapered hole 117 that is provided on the floor of the stop station 91 and that is adjustable in the horizontal direction (front, rear, left, and right) so that the rod 115 can be aligned and fitted. A receiving piece 116 having
The height position where the rod 115 is fitted into the tapered hole 117 and the tapered hole 117 each time the pushing operation is performed on the rod 115, which is related to the guide cylinder 114 and the rod 115.
It has a publicly known position changing device (not shown) for alternately stopping the movement to a height position where it completely comes out. With such a configuration, by adjusting the positions of the first positioner 107 and the second positioner 113 in advance, after the roller 108 is fitted into the notch 110 of the receiving block 109, the rising rod 115 is tapered. The hand truck 62 can be positioned by fitting it into the hole 117. The roller 108 may be attached to the floor surface of the stop station 91 and the receiving block 109 may be attached to the hand truck 62. Further, the rod 115 may be attached to the floor surface of the stop station 91 and the receiving piece 116 may be attached.
May be attached to the hand truck 62. The roller 108 may be a simple block.

Embodiment 2 (see FIGS. 11 to 13) In this Embodiment 2, the front means the right side of FIG. 11, the rear means the left side of FIG. 11, the left means the upper side of FIG. 11, and the right means the same figure. The lower side. In short, the front / rear and left / right are set based on the direction of the hand cart 62.

The elevating table 78 can be moved up and down by a known elevating device 121. The elevating device 121 includes a known elevating mechanism 122 having a pair of X-shaped link mechanisms whose intersections are pivotally connected, a hydraulic unit 123 including a cylinder for operating the elevating mechanism 122, and the hydraulic unit 123. It has an operating pedal 124 and a lifting rod 125. The operating pedal 12
The elevating table 78 is raised by the pushing operation of 4, and the elevating table 78 is slowly lowered by the raising operation of the elevating rod 125.

Unlike the first embodiment, the sliding device 79 is operated by the manual rotation handle 128. That is,
The motor 4 of the first embodiment is removed, and the manual rotation handle 128 is used.
By transmitting the rotation of the worm 129 and the worm wheel 130 to the shaft of the sprocket 23,
The slide fork 3 is activated. As is clear from this description, the operation of the slide fork 3 may be manual or electric. The slide fork 3 of the second embodiment moves back and forth with respect to the hand truck 62.

As shown in FIGS. 11 and 13, a positioning device 106 for the hand truck 62 is provided. The positioning device 106 has a first positioner 107 and a second positioner 113. The first positioner 10
A roller 108 is attached to the front right side of the hand cart 62 such that the shaft center is oriented in the up-and-down direction and is adjustable in the horizontal position (front-rear and left-right positions).
It has a receiving block 109 having a planar V-shaped notch 110 into which the roller 108 is fitted, which is provided on the floor surface of the stop station 91 so as to be adjustable in the horizontal position (front, rear, left and right positions). The second positioner 113
Is rotatably attached to the front left side of the hand truck 62 with its axis centered in the vertical direction and adjustable in horizontal positions (front-rear, left-right positions), and on the floor of the stop station 91. And a receiving piece 132 having a contacting side surface with which the roller 108, which is provided so as to be adjustable in the horizontal position (front and rear, left and right positions), contacts. By adjusting the positions of the first positioner 107 and the second positioner 113 with the above-described configuration, the cutout 110 of the receiving block 109 of the right roller 108 is received.
Then, the hand truck 62 can be positioned by pressing the left roller 108 against the receiving piece 132. The roller 108 may be attached to the floor surface of the stop station 91, and the receiving block 109 and the receiving piece 132 may be provided on the hand truck 62.

FIG. 12 shows a push handle 64 of the second embodiment.

Instead of the slide fork 3, an article transfer robot may be used as the article transfer device.

[0029]

The present invention has the following effects due to the above-mentioned configuration. The article transfer device can place an article on the hand truck or unload the article from the hand truck without the need for human labor.

[Brief description of drawings]

FIG. 1 is a simplified plan view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an exploded perspective view of a lifting device for a lifting platform.

FIG. 4 is a side view of a slide fork portion,
(A) shows a non-sliding state, and (b) shows a sliding state.

FIG. 5 is an enlarged cross-sectional view taken along line VV of FIG.

6 is a cross-sectional view taken along line VI-VI of FIG. 5 (slightly reduced).

FIG. 7 schematically shows an interlocking mechanism of a slide fork sliding device, in which (a) is a non-sliding state and (b) is a diagram.
Is a diagram of a sliding state.

FIG. 8 is an enlarged cross-sectional view taken along the line VIII-VIII of FIG.

9 is an enlarged sectional view taken along line IX-IX in FIG.

10 is an enlarged cross-sectional view taken along line XX of FIG.

FIG. 11 is an elevational view showing a second embodiment of the present invention.

FIG. 12 is a perspective view of a handle portion.

13 is an enlarged sectional view taken along line XIII-XIII in FIG.

[Explanation of symbols]

 3 Slide fork 62 Hand cart 63 Body

Claims (2)

[Claims] 1. A hand truck having an article transfer device for moving articles horizontally and vertically on a vehicle body. 2. The hand truck according to claim 1, wherein the article transfer device has a lifting table and a slide fork provided on the lifting table so as to be horizontally movable.