JPH0794283B2 - Towing device for transport cart - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a towing device that conveys and moves a carrier truck or the like in a product assembly factory, and more specifically, loads assembly parts on the carrier truck in a product assembly process. The present invention relates to a traction device using an engagement drive mechanism of a carriage and a transfer device for sequentially performing assembly and assembly work.

(Prior Art) In the conventional towing device of this type, when a carriage is engaged with a conveyor as a transfer device to drive it, a pin for engaging the carriage on the conveyor side and the bottom side is released. For example, those that are provided side by side and that are combined with a dolly that has a hooking mechanism to convey them, or that have fixed protrusions on the dolly side and that are combined with a conveyor that has uneven parts to convey There is.

(Problems to be Solved by the Invention) In the conventional traction device as described above, in the former case, when the carriage is separated from the conveyor, hooking pins, release members, and the like stand on the conveyor and the floor surface, which become an obstacle. There is a work inconvenience that the trolley and workers cannot freely move back and forth across the conveyor, and in the latter case, in order to separate the trolley from the conveyor, the trolley must be lifted from the conveyor and disengaged. There were problems such as requiring work.

The haulage truck traction device of the present invention is intended to solve these problems and to be installed inexpensively and easily so as to improve the efficiency of the assembling work.

(Means for Solving the Problems) In order to achieve the above object, the present invention is provided on the upper surface of a strip plate which is installed so as to be slidably driven on the floor surface in the longitudinal direction along the longitudinal direction. Provide hooking holes at appropriate intervals, and equip a dolly that moves on the floor with a transporting member such as casters so that the hook pin can drop downwards by using gravity. We propose a traction device for a carrier truck which is inclined downwards toward the side and is formed on the hypotenuse side and the elbow side, and is combined so as to engage the lower elbow side of the hook pin of the dolly with the engaging hole of the strip.

Therefore, by a driving operation in the front-rear direction and the lower oblique side of the hook pin of the carriage, the carriage is moved to a predetermined position on the floor, stopped, and a series of operations for releasing from the engaging hole portion of the strip is automatically operated, The separated trolley can freely move in the transverse direction without being obstructed by the strip.

(Function) The lower elbow side of the hook pin of the truck set on the strip is simply slid forward to the front side of the strip when it is slid forward, and only the strip is fed forward. Then, the lower end elbow of the hook hole, which has fallen down due to the weight of the hook pin, automatically fits into the hole and engages with it, and the carriage that is forwardly forwards the carriage to a predetermined position for conveyance. .

Next, by sliding the strip back, the hook pin of the truck that was fitted into the strip engagement hole moves backward using the slanted rear slope of the lower edge. It is pushed up gradually by the edge of the, the lower elbow side is supported by the upper surface of the strip without hooking holes, and it is automatically released from the fitted state, and the carriage is free from the strip and can be moved freely. In this manner, the carriage is automatically engaged with and released from the strip plate that slides, and is pulled to be conveyed to a predetermined position.

In an emergency, the hook pin that falls out by using its own weight can be manually inserted into and removed from the fitting hole of the pick-up strip to engage and separate the carriage with the strip.

(Embodiment) Next, a concrete embodiment of a towing device for a carriage according to the present invention will be described with reference to the drawings.

FIG. 1 is a front view of a towing device for a carriage for carrying out the present invention, FIG. 2 is an enlarged vertical front view of an essential part of the same, and FIG. 3 is a perspective view of an essential part showing a state of engagement between a strip plate and a bogie. 4 is an exploded perspective view showing a hook pin portion of a truck, FIG. 5 is a partial perspective view showing an embodiment of a hooking hole portion of a strip plate, and FIG. 6 is a main portion showing an embodiment of a hook pin. 7 and 7 are schematic front views showing the drive mechanism of the strip, in which (1) shows the strip, which is made of a hard material such as a metal strip having a predetermined width and thickness. Both ends are connected to a driving device (3) and are equipped to slide back and forth on the floor (10) surface along the length direction.

On the strip (1), long through-hole-shaped engaging holes (2) and (2) are formed in parallel along the length direction at predetermined intervals.

As shown in FIG. 5, a belt (1) is mainly composed of a timing belt, and a plate (1a) made of a hard material such as metal and provided with engaging holes (2) on its upper surface is provided at predetermined intervals. It is also possible to fix them by fixing them. In this case, the effect of engaging and pulling can also be obtained by providing the engaging hole (2) on the front end side of the plate (1a) in a notched shape.

(4) is a dolly, and casters (8) and (8) are attached to the lower surface so as to cross the strip plate (1) so as to travel on the floor (10), and the front and rear side portions are vertically moved. The attachment parts (6c) of the hook holders (6) provided with the open support parts (6a) are mounted respectively, and the elbow pieces (6b) at the tips of the hook holders (6) and (6) are attached to the guide member (7). The guide holding portion (7a) which is fitted and attached to the receiving portion (7b) of the holder holds the both sides along the length direction of the strip (1), and is pulled by the strip (1). Guide the dolly (4) inside to eliminate rattling and stabilize the direction.

(5) is a hook pin made of a hard material such as metal,
The cross-sectional shape is vertically long and wider than the length of the engaging hole (2) in the front-rear direction, and the hook pin (5) is provided on the front side surface of the carriage (4) to support the hook (6). In 6a), it is inserted and supported so that it will fall out by using its own weight. The hook pin (5) has a lower engaging part (5a), the front side is notched obliquely, and the downward oblique side (5b) from the front side to the rear side.
And an elbow side (5c) having a vertical side on the rear side. As shown in FIG. 6, the oblique side (5b) can be provided without forming the cross-sectional shape of the engaging portion (5a) to be wide corresponding to the length of the engaging hole portion (2) in the front-rear direction. The engaging action of the plate (1) with the engaging hole portion (2) is sufficiently obtained.

As the drive device (3), FIG. 6 (a) (b) (c)
Left and right guard motors (3a) (3a) as shown in (d)
In addition to those driven by a geared motor (3a) and spring (3b), hydraulic or pneumatic (3c) and damper (3
d), rack (3f) pinion gear (3g) with motor (3e) and the above spring (3b) or damper (3d)
The strip plate (1) is slidably driven by various combinations of and, and the feed speed thereof can be freely set from ultra-low speed to high speed.

With such a structure, the strip (1) is reciprocally driven back and forth with a constant stroke, and the strip (1) is driven forward.
In the cart (4) set at the upper start position, the vertical elbow side (5c) of the hooking portion (5a) of the hook pin (5) is the strip plate (1).
The hook pin is hooked on the rear end edge of the hooking hole (2) of the hook, pulls the carriage (4) forward to move it to a predetermined position, and then drives the strip plate (1) backward to drive the hook pin. (5) Utilizing the rearward descending slope of the hypotenuse (5b) of the engaging part (5a), ride on the front end edge of the engaging hole (2) and push the hook pin (5) upwards, and the elbow side (5c). Is automatically removed from the engaging hole portion (2) of the strip plate (1) and only the strip plate (1) is driven backward, the carriage (4) is separated from the strip plate (1) and the carriage (4) is removed. It will be in a stopped state and can be freely pushed across the strip (1) to the next work station. When a new carriage (4) is set again on the strip plate (1) at the start position and driven forward, the carriage (4) is repeatedly engaged with the strip plate (1) repeatedly and conveyed forward.

In this way, the carts (4) set by reciprocating the strip plate (1) back and forth are successively and repeatedly transported, and the assembly work is carried out while transporting the assembly parts (9) loaded on the carts (4). To do.

(Effects of the Invention) According to the present invention, as described above, the engaging hole portions are provided side by side on the flat strip plate which is equipped to drive forward and backward along the length direction, while the lower end engaging portion moves backward and downward. A trolley equipped with a hook pin formed on the oblique side and the elbow side that is diagonally cut out to drop downwards by its own weight is combined with the strip plate, and in the engaging hole part of the strip plate that slides forward or backward on the floor surface, The lower end engaging part of the hook pin that automatically falls is engaged and the dolly is connected to the strip, and the forward drive of the strip pulls the dolly forward to convey it. As a result of the drop engagement, a reliable connection is automatically obtained, and the drive of the strip can be reliably and safely transmitted to the carriage.

In addition, using the hook pin's own weight and the rear downward slope of the lower slanted side, it is possible to automatically and easily attach / detach the hook pin of the truck to / from the engaging hole of the strip by simply sliding the strip back and forth. It is possible to perform it. Especially, the automatic pull-out operation of the hook pin by the backward drive (reverse rotation) of the strip and the action of the backward slope of the hypotenuse is effective, and the efficiency of the parts assembly work on the dolly on which the product parts are placed is increased. Improve.

In addition, since the flat belt (1) is used for transporting and transmitting, in a product assembly factory where the traction device is installed, a truck or the like can freely cross the assembly line where the belt can be laid, and By being able to move back and forth efficiently, it is possible to further improve work efficiency.

Moreover, since it is a traction device that slides the strip back and forth, the laying or changing construction of the device can be done easily and inexpensively, and it is a facility for carrying and moving long processes in a large factory. However, it is possible to store the equipment on the floor in a low volume with a small driving device, and it is possible to obtain an effect such that the equipment can be easily installed in a small space.

[Brief description of drawings]

FIG. 1 is a front view of a haulage vehicle traction device embodying the present invention, FIG. 2 is an enlarged vertical sectional view of an essential part of the same, and FIG. 3 is a perspective view of an essential part showing a state of engagement between a strip and a dolly. FIG. 4 is an exploded perspective view showing the guide portion and hook pin portion of the truck, FIG. 5 is a partial perspective view showing another embodiment of the strip plate, and FIG. 6 is another embodiment of the hook pin. FIG. 7 is a schematic front view showing the drive mechanism for the strips, and FIG. In the figure, (1) is a strip plate, (2) is a hooking hole portion, (3) is a drive device, (4) is a truck, (5) is a hook pin, (5a) is a hooking portion, and (5b) is a hypotenuse, (5c) shows the elbow side.

Claims (2)

[Claims] 1. A strip having an engaging hole on its upper surface is installed so as to be slidably driven on the floor along any direction along its length, while gravity is used for a carriage moving on the floor. A hook pin that drops downward is provided, and the lower end side of the hook pin is inclined downward from the front side to the rear side to form an oblique side and an elbow side. A combined truck traction device. 2. The engagement hole portion of the strip plate is formed to be long along the length direction, and the engagement portion of the hook pin is formed to have a longitudinal cross section so as to engage with the engagement hole portion. A tractor for a carriage for transportation according to the item.