JPH0958874A - Hand truck positioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To position a hand truck correctly into a specified position even in case of being pushed in from either the front or rear side by laterally positioning the truck by truck side inner and outer rollers with a rising piece on the ground side placed in between, and fitting a truck side rod into a fit-in hole on the ground side. SOLUTION: A front side inner roller 11 is first brought into contact with the right side face of a rear end part of a vertical part 21 of a member 20 of L-shape cross section. A hand truck is then moved forward while sliding the inner roller 11 along the right side face of the vertical part 21, and an outer roller 12 is brought into contact with the left side face of the rear end part of the vertical part 21. In this state, the hand truck is moved forward to bring a rear side inner roller 11 into contact with the right side face of the rear end part of the vertical part 21. In this state, the lateral positioning of the hand truck to a specified position is completed. The hand truck is then positioned in a slightly frontward specified position. Front and rear rods are positioned directly above front and rear fit-in holes 23, 23, and the rear (closer) rod is lowered and fitted into the fit-in hole 23 to complete longitudinal positioning.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Heretofore, a hand truck having an article transfer device such as a slide fork has been known. In such a hand cart, since articles are delivered to and from the unloading platform by a slide fork or the like, it is necessary to accurately position the trolley with respect to the unloading platform. As a positioning device for a hand truck, a block having a planar V-shaped notch is provided on the ground side, a roller fitted in the notch is provided on the cart side, and the shaft center is oriented vertically on the ground side. It is known that a receiving piece having a tapered hole is provided, and a rod that can be moved up and down to be fitted in the tapered hole is provided on the trolley side.

[0003]

However, in such a conventional hand truck, since the roller on the truck side is fitted into the notch having the planar V-shape provided on the block on the ground side, one direction ( Positioning was possible only when the hand truck was pushed from the V-shaped release direction).

The present invention has been made in view of the above problems, and an object thereof is to provide a positioning device for a hand truck that can accurately position the hand truck at a predetermined position regardless of whether it is pushed forward or backward. is there.

[0005]

In order to achieve the above object, the invention as set forth in claim 1 is provided with a long rising piece in front and back and a fitting hole on the ground side, and the rising piece on the trolley side. A hand-held cart positioning device is provided with an inner roller and an outer roller that position the carriage in the left-right direction by sandwiching the left and right sides, and a vertically movable rod that fits in the fitting hole.

According to a second aspect of the invention, on the trolley side,
The inner roller is provided at the front end and the rear end, and the outer roller is provided at the front-rear center.

According to a third aspect of the present invention, the fitting hole and the rod are provided at two front and rear positions, respectively.

According to a fourth aspect of the present invention, the rising piece is a vertical portion of an L-shaped section member, and the fitting hole has a section L section.
It is assumed to be provided on the horizontal portion of the character-shaped member.

The present invention has the following functions. In the invention according to claim 1, the truck is positioned in the left-right direction by sandwiching the ground-side rising piece from the left and right by the truck-side inner roller and the truck-side outer roller, and in that state, the truck-side vertically movable rod is mounted on the ground side. The dolly can be positioned in the front-rear direction by fitting the dolly into the fitting hole.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited to the embodiments without departing from the spirit of the present invention. In this embodiment, the front means the upper side in FIG. 1, the rear means the lower side in FIG. 1, the left means the left side in FIG. 1, the right means the right side in FIG. 1, and the upper side means the front side in FIG. The lower side means the back side of the figure.

The hand cart 1 is composed of a cart main body 2 and other peripheral members. The trolley body 2 has a box shape, and an elevating mechanism and the like (not shown), which will be described later, are provided inside the trolley body 2.

On the lower surface of the trolley body 2, there are two front and rear end portions at the left and right center position, and two at both left and right end portions at the front and rear center position.
Individual casters 3 are provided. Out of these, the two front and rear casters 3, 3 are rotatable about the vertical axis.

A support block 4 having a step-down portion 4a into which a bottom corner of a transport case 10 such as a liquid crystal cassette fits is located on the upper surface of the trolley body 2 at a square corner corresponding to the size of the transport case 10. It is provided to do. That is,
An article placement surface is formed by the step-down portions 4a of the four support blocks 4, and the placement of the placed transport case 10 is restricted so as not to move in the horizontal direction. The article mounting surface formed by the step-down portion 4a is slightly inclined so as to descend to the right.

A slide fork 5 is provided on the upper surface of the trolley body 2 at a position sandwiched by four support blocks 4 so that the slide fork 5 can move up and down and can move back and forth left and right. Trolley body 2
A handle 6 for advancing and retracting the fork is provided on the upper rear surface. The handle 6 is connected to a fork advance / retreat mechanism (not shown) provided inside the carriage main body 2,
An operator can move the slide fork 5 back and forth by turning the handle 6. The handle 6 is also moved up and down as the slide fork 5 is moved up and down.

Further, a pedal 7 for raising the fork and a knob 8 for lowering the fork are provided on the rear surface of the carriage main body 2. The pedal 7 and the knob 8 are connected to a hydraulic switching valve (not shown) of a hydraulic cylinder for raising and lowering a fork provided inside the carriage main body 2. With this configuration, the pedal 7 is stepped on with the foot and the slide fork 5
Can be raised from the lowest position to the highest position, and the knob 8 can be operated to lower it from the highest position to the lowest position.
The pedal 6 is provided on the lower right portion of the rear surface of the carriage main body 2 so that the pedal 6 can be easily depressed. When the slide fork 5 is at the lowermost position or the uppermost position, its upper surface is located slightly below or slightly above the article mounting surface.

On the front upper part and the rear upper part of the trolley body 2,
Handles 9 and 9 that the operator grips when pushing the dolly are provided.

With the above-described structure, the hand truck 1 on which the carrying case 10 is placed is moved to the right side of the unloading platform 30 while grasping the handle 9, and the hand truck 1 is positioned at a predetermined position by means described later. By operating the handle 6, the pedal 7 and the knob 8, the transport case 1
0 can be transferred to the unloading table 30. Similarly,
The carrying case 10 can be received from the unloading platform 30 by operating the handle 6, the pedal 7 and the knob 8 while the hand cart 1 on which the carrying case 10 is not placed is positioned at a predetermined position.

Next, the positioning of the hand cart 1 at a predetermined position will be described. First, the trolley-side positioning device will be described. In the lower left side surface of the trolley body 2,
Inner rollers 11 and 11 are provided at the front and rear ends, and an outer roller 12 is provided at the front-rear center. Inner roller 11 and outer roller 12 are required bracket 1
It is rotatably provided below the lower surface of the carriage main body 2 with the axis centered in the up-down direction via 3, 4.

Guide cylinders 15, 15 are provided on the lower left front part and the lower left rear part of the bogie main body 2 so that the axes thereof are oriented in the vertical direction through the necessary brackets. There are provided rods 16, 16 which can be guided to alternate between raised and lowered positions.
When the rod 16 is in the lowered position, the lower end thereof fits into a fitting hole 23, which will be described later, and when the rod 16 is in the raised position, the lower end thereof comes to a position separated upward from the fitting hole 23.

Next, the positioning device on the ground side will be described. On the ground to the immediate right of the unloading platform 30, there are a vertical part 21 and a horizontal part 22 bent from the lower end of the vertical part 21 to the right. The L-shaped member 20 in cross section is provided with the longitudinal direction as the front-rear direction. The vertical portion 21 of the L-shaped cross-section member 20 is a rising piece that guides the hand cart 1 in the front-rear direction by sliding the inner roller 11 and the outer roller 12 on the bogie side. L-shaped member 2 in section
Insertion holes 23, 23 having the same or slightly larger diameter as the diameter of the rod 16 are provided at the front and rear ends of the horizontal portion 21 of the rods 0, 16 when the hand cart 1 is at a predetermined position.
It is installed in a position just below.

Next, the positioning operation by such a positioning device will be described. First, the inner roller 11 on the front side is brought into contact with the right side surface of the rear end of the vertical portion 21 of the L-shaped cross-section member 20 (state A in FIG. 1). Then, the hand truck 1 is moved forward while sliding the front inner roller 11 to the right side surface of the vertical portion 21 to bring the outer roller 12 into contact with the left side surface of the rear end portion of the vertical portion 21 (FIG. 1). B state). After that, the hand truck 1 is moved forward while sliding the front inner roller 11 and the outer roller 12 on the right side surface and the left side surface of the vertical portion 21, and the rear inner roller 11 is moved to the rear end portion of the vertical portion 21. Abut the right side of the. In this state, the hand cart 1 is accurately fixed in its orientation by restricting the horizontal inclination, and the lateral positioning with respect to the predetermined position is completed. At this time, when the hand cart 1 is moved, the vertical portion 21 is sandwiched by the inner roller 11 and the outer roller 12 on the front side from the left and right, and the movement in the left and right direction is regulated, so that the hand truck 1 is guided in the front and rear direction. The hand cart 1 can be easily pushed forward. After that, the hand truck 1 is positioned at a predetermined position a little forward, and the front and rear rods 16 and 16 are inserted into the front and rear fitting holes 2.
It is located right above 3, 23 (state C in FIG. 1). After that, the rod 16 on the rear side (closer side) is lowered to insert the insertion hole 2
The hand truck 1 is positioned in the front-rear direction by being fitted into the hand truck 3.

The positioning when the hand cart 1 is pushed from the rear side has been described above, but the same can be done when the hand cart 1 is pushed from the front side.

A push button type or the like may be used in place of the handle 6, the pedal 7 and the knob 8 for moving up and down and moving the slide fork 5 forward and backward. Further, these operating members may be provided on both front and rear surfaces of the bogie main body 2. Further, an article transfer robot may be used as the article transfer device instead of the slide fork 5.

[0024]

The present invention is configured as described above.
The following effects are obtained. According to the invention of claim 1, the truck is positioned in the left-right direction by sandwiching the ground-side rising piece from the left and right with the truck-side inner roller and the truck-side outer roller, and in that state, the truck-side vertically movable rod is mounted. The bogie can be positioned in the front-rear direction by being fitted in the fitting hole on the ground side. Therefore, the carriage can be accurately positioned at the predetermined position from both the front and the rear.

According to the second aspect of the present invention, it is possible to easily and accurately position the carriage in the left-right direction with the minimum necessary number of rollers.

According to the third aspect of the present invention, since the fitting hole and the rod are provided at two positions in the front and rear, no matter which of the front and the rear pushes the carriage, the rod closer to the fitting hole is fitted in the fitting hole. By inserting it, it is possible to quickly position the carriage in the front-rear direction.

According to the fourth aspect of the present invention, by installing the L-shaped member having the L-shaped cross section in which the fitting hole is formed in the horizontal portion on the ground, the vertical portion of the L-shaped member having the L-shaped cross section becomes a rising piece at the same time. Therefore, the rising piece and the fitting hole can be effectively provided on the ground side.

[Brief description of drawings]

FIG. 1 is a simplified plan view for schematically explaining a positioning operation of the present embodiment.

FIG. 2 is a rear view showing the hand cart in a predetermined position.

FIG. 3 is a plan view showing the hand cart in a predetermined position.

[Explanation of symbols]

 1 Hand cart 2 Car body 10 Transport case 11 Inner roller 12 Outer roller 20 Cross section L-shaped member 21 Horizontal part 22 Vertical part 23 Fitting hole

Claims (4)

[Claims] 1. An inner roller and an outer roller which are provided on the ground side with a long front and rear rising piece and an insertion hole, and on the trolley side, which position the trolley in the left and right direction by sandwiching the rising piece from the left and right, A positioning device for a hand truck, which is provided with a rod which can be raised and lowered and which fits in the fitting hole. 2. The positioner for a hand truck according to claim 1, wherein the inner roller is provided at a front end portion and a rear end portion on the dolly side, and the outer roller is provided at a front and rear central portion. 3. The insertion hole and the rod are provided in front and rear 2 respectively.
The device for positioning a hand truck according to claim 1 or 2, which is provided at a location. 4. The hand pusher according to claim 1, wherein the rising piece is a vertical portion of the L-shaped member in cross section, and the fitting hole is provided in a horizontal portion of the L-shaped member in cross section. Positioning device for dolly.