JP2002120920A - Power and free drive mechanism - Google Patents

Abstract

(57) [Problem] To improve the production efficiency by shortening the moving time of the work 10, if the carriage 1 of the conventional power and free drive mechanism is run faster than the running speed of the chain conveyor 11, An object of the present invention is to solve the problem that the stop surface 9c of the anti-back hits the dog 13 so that the carriage 1 can easily run at high speed. SOLUTION: The force of the oscillating motion of a front wing 7 is transmitted to an anti-back 9 by a direct follow-up mechanism, or the oscillating motion of the front wing 7 is transmitted to the vertical motion of a hook 8 and further transmitted to the anti-back 9 by a follow-up mechanism. Then, only by swinging the front wing 7 upward, both the hook 8 and the anti-back 9 are moved upward so as to be in a position where they do not hit the dog 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

2. Description of the Related Art In a power and free drive mechanism, when a front end of a front wing is lifted during conveyance, the front wing swings upward to lift a hook. When the hook moves upward, it is no longer pushed by the dog, and the carriage stops at that position. Also, if the rear wing is attached to the rear of the carriage and the front wing of the succeeding carriage is swung upward, the subsequent carriage stops without colliding with the stopped carriage. As described above, it has features such as allowing the carriage to travel along with the movement of the chain conveyor, stopping the carriage at an arbitrary position, and accumulating and stopping a plurality of carriages. The drive mechanism is often used for transporting a work requiring transfer and stoppage in a factory. Also, chain conveyors are not suitable for high-speed running because noise increases when the speed is increased. For this reason, in particular, when the vehicle travels at high speed, a driving device such as a cylinder is often provided separately from the power and free driving mechanism to directly push the carriage. The present invention relates to such a power and free drive mechanism, and transmits the force of the swinging motion of the front wing to the anti-back by a direct follow-up mechanism, or transmits the swinging motion of the front wing to the up-and-down motion of the hook. The present invention relates to a configuration in which the carriage and the dog are completely separated only by swinging the front wing upward, so that the carriage is driven at a high speed.

[0002]

2. Description of the Related Art In a conventional power-and-free drive mechanism, the force of the oscillating movement of the front wing is used only for the vertical movement of the hook, and there is no follow-up mechanism for transmitting the force to the anti-back. Therefore, even if the front wing is swung upward and the hook is raised, if the carriage runs faster than the traveling speed of the chain conveyor, there is a problem that the stop surface of the anti-back hits the dog. Could not be run. However, demands for improving production efficiency have led to a demand for high-speed movement between work processes. This is because the target improvement in production efficiency cannot be achieved only by shortening the work process, and shortening the moving time of the work has become a major issue. Conventionally, in order to answer this, a guide rail or the like is installed in a range where the carriage is desired to travel faster than the traveling speed of the chain conveyor, a guide is attached to the anti-back, the guide is raised by the guide rail, and the anti-back is lifted upward. It was necessary to take special measures such as the method and lowering the chain conveyor only in the range where the carriage was to be run faster than the running speed of the chain conveyor.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to eliminate the above-mentioned drawbacks of the prior art, and has as its object to reduce the force of the swinging motion of the front wing by a direct follow-up mechanism. It transmits to the back, or transmits the swinging motion of the front wing to the vertical motion of the hook, and transmits it to the anti-back by the follow-up mechanism. By simply swinging the front wing upward, both the hook and the anti-back move upward. In this configuration, the carriage and the dog are separated from each other so that the carriage can be moved faster than the traveling speed of the chain conveyor.
In addition, the present invention eliminates the drawbacks of attaching the guide rail and the guide to lift the anti-back upward, which requires special consideration and extra cost, and separates the carriage and the dog by a simple and inexpensive structure, thereby separating the carriage and the carriage. An object of the present invention is to make it possible to run faster than the running speed of a chain conveyor.

[0004]

SUMMARY OF THE INVENTION According to the present invention, by lifting and swinging the front end of the front wing of the carriage, the hook moves upward and the anti-back also swings upward, so that both do not hit the dog. By separating the carriage from the dog, the carriage can be moved faster than the traveling speed of the chain conveyor by pushing the carriage with a separately provided cylinder or the like. The arrow A in FIG. 1 indicates the traveling direction. In this specification, the traveling direction is referred to as the front side, the opposite direction is referred to as the rear side, and the direction in which the workpiece 10 is placed is referred to as the upward direction. One direction is called downward.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to one embodiment shown in FIGS. On the right side of FIG. 1, a state in which the tip 7 b of the front wing 7 is lowered and the hook 8 of the carriage 1 is pushed by the dog 13 of the chain conveyor 11 (hereinafter, simply referred to as “down state”) is represented by a solid line. The tip 7b of the front wing 7 is on the left side of FIG.
Is raised upward, and a state in which neither the hook 8 nor the anti-back 9 of the carriage 1 hits the dog 13 (hereinafter, simply referred to as “raised state”) is represented by a chain line. The carriage 1 is a carriage having a wheel 4 and a loading attachment 2 attached to a main frame 3. In this embodiment, a rear frame 6 is connected via a connection frame 5, and a rear wing 6 a is attached to the rear frame 6. Usually, there is no need to divide the main frame 3 and the rear frame 6. In this embodiment, the carriage 1 has a divided structure in order to run on the rail 15 which is bent in the vertical direction. A pin 7a is attached to the main frame 3, and a front wing 7 is attached so as to swing only upward from a state in which the pin 7a is lowered. The tip 7b of the front wing 7 has an arc shape, and the pin 7a and the front A pin 8a is attached at an intermediate position with respect to the tip 7b of the wing. Although the hook 8 is swingably attached to the pin 8a, the hook 8 is guided by the guide roller 8d attached to the main frame 3, so that the hook 8 can be generally moved up and down. A push surface 8c is provided at a lower rear portion of the hook 8, and a protrusion 8b is provided at an upper portion of the push surface 8c.

A pin 9a is attached to the main frame 3, and an anti-back 9 is attached so that it can swing only upward from a state in which the pin 9a is lowered. Anti back 9
Is provided with a stop surface 9c on the front side and a protrusion 9b on the upper portion of the stop surface. In the lowered state, the stop surface 9c of the anti-back 9 and the pressing surface 8c of the hook 8 are positioned substantially in parallel with a predetermined interval, and the projection 9b of the anti-back 9 is located above the projection 8b of the hook 8. In such a manner that the tips are arranged substantially in parallel with each other and their tips overlap each other. The chain conveyor 11 is driven by a power unit (not shown) and travels in the direction A. Dogs 13 are attached to the chain conveyor 11 at predetermined intervals, and are supported by wheels 12 provided at some places. The wheels 4 of the carriage 1 are held by rails 15, and the wheels 12 of the chain conveyor 11 are held by rails 16, and the rails 15 and 16 are held by columns 17.

The present invention is configured as described above,
Hereinafter, the operation will be described. In the lowered state, the dog 13 is located between the stop surface 9c of the anti-back 9 and the pressing surface 8c of the hook 8, and the pressing surface 8c of the hook 8 is
, The carriage 1 travels with the work 10 loaded thereon at the same speed as the traveling speed of the chain conveyor 11.
At this time, even if some kind of force is applied to make the carriage 1 run faster than the chain conveyor 11, the anti-back stop surface 9c hits the dog 13 and the chain conveyor 1
The carriage 1 does not run faster than the speed 1. When stopping the carriage 1, if the front end 7b of the front wing 7 is lifted, the hook 8 also moves upward. At this time, the projection 8b of the hook 8 pushes the projection 9b of the anti-back 9, so that the anti-back 9 also swings upward. When the carriage 1 is raised, the carriage 1 is stopped being pushed by the dog 13 and stopped.

When the carriage 1 is stopped and then moved again, when the tip 7b of the front wing 7 is lowered, the hook 8 moves downward and the anti-back 9 also swings downward. Since the anti-back 9 can freely swing upward, there is no problem even if the anti-back 9 hits the dog 13 while the anti-back 9 is lowered. When the dog 13 is lowered, the dog 13 has an anti-back stop surface 9c and a hook pressing surface 8c.
If not, the dog 13 on the rear side travels in the direction A and pushes up the anti-back 9 to enter between the stop surface 9c and the hook pressing surface 8c. When the carriage 1 travels at a high speed, a guide or the like is installed to lift the front end 7b of the front wing 7 upward, so that the raised state is maintained throughout the high-speed traveling range. Then, a high-speed driving device such as a cylinder driving device or a screw driving device (Japanese Patent Application No. 11-305838) is attached, and only the range in which the vehicle runs at high speed is driven.

Next, another embodiment of the present invention will be described with reference to FIGS. In each of the figures, the state of falling to the right is represented by a solid line, and the state of rising to the left is represented by a one-dot line.
In the embodiment of FIG. 3, the entire pressing surface 18c of the hook 18 is a projection, and the projection 19b of the anti-back 19 is the pressing surface 1c of the hook.
8c. The embodiment of FIG.
5 and the anti-back 26 were connected by a connecting member 27. Suitable connecting materials are spring materials such as coil springs and leaf springs, elastic materials such as rubber and air cushions, but also materials such as strings, ropes, tapes, and chains that transmit tensile force but do not transmit compressive force are also suitable. It is. In the embodiment shown in FIG. 5, a pin 31a attached to the hook 31 and a pin 32a attached to the anti-back 32 are connected by a link 33, and the attachment hole 33a of the link 33 is made to be an elongated hole.

3 to 5 show the hook 1
The upward moving force of 8, 25, 31 is transmitted to the anti-backs 19, 26, 32, and the anti-backs 19, 26, 3
2 swings upward. Here, the reason why the embodiment of FIG. 4 uses an elastic material, a string, or the like is because the upward moving force of the hook 25 can be transmitted to the anti-back 26. In addition, dog 1 on the back
This is to reduce the resistance when the vehicle 3 runs in the direction A and pushes up the antiback. In the embodiment shown in FIG. 5, the attachment hole 33a of the link 33 is elongated because the dog 13 on the rear side runs in the direction A and pushes up the anti-back 32 in the upward direction. This is for enabling the rocking. In addition, there is a method in which the mounting hole of the pin 32a on the anti-back 32 side is made to be an elongated hole, and is not limited to this embodiment.

Another embodiment will be described with reference to FIG.
In FIG. 6 as well, the state of falling to the right is represented by a solid line, and the state of rising to the left is represented by a one-dot line. In the embodiment of FIG. 6, the pin 20a attached to the front wing 20 and the anti-back 2
The pin 22a attached to the anti-back 22 is connected by a link 23, and the mounting hole 22b of the pin 22a of the anti-back 22 is elongated. In this embodiment, the upward swinging force of the front wing 20 is directly transmitted to both the upward swinging force of the hook 21 and the upward swinging force of the antiback 22. In this embodiment, the anti-back 2
The reason why the mounting hole 22b of the second pin 22a is elongated is that the dog 13 on the rear side runs in the A direction and allows the anti-back 22 to swing upward when the anti-back 22 is pushed up. It is. In addition, there is a method in which the mounting hole on the link side of the pin 22a is made to be an elongated hole, and is not limited to this embodiment. In this embodiment, the front wing 20 and the anti-back 22 are connected by the link 23, but a spring material such as a coil spring or a leaf spring, rubber, an air cushion or the like having elasticity, a string, a rope, a tape, a chain, or the like. It is also preferable to use a material that transmits a tensile force but does not transmit a compressive force as a connecting material and connect the front wing and the anti-back.

[0012]

According to the present invention, the swinging motion of the front wing is transmitted to the anti-back by the direct follow-up mechanism, or the swing motion of the front wing is transmitted to the vertical movement of the hook, and further transmitted to the anti-back by the follow-up mechanism.
By simply swinging the front wing upward, both the hook and the anti-back move upward so that they do not hit the dog, the carriage and the dog are separated, and the carriage is moved from the traveling speed of the chain conveyor. You can now run faster. In addition, the present invention eliminates the drawbacks of attaching the guide rail and the guide to lift the anti-back upward and lowering the chain conveyor, requiring special consideration and extra cost. The dog and the dog were separated, and it was possible to make the carriage travel faster than the traveling speed of the chain conveyor. Further, according to the present invention, a high-speed traveling of the carriage can be easily performed, and a major problem of shortening the moving time of the work can be achieved. Therefore, it is possible to improve the production efficiency which cannot be achieved only by shortening the work process. A power and free drive mechanism could be provided.

[Brief description of the drawings]

FIG. 1 is a side view of one embodiment of the present invention.

FIG. 2 is a sectional view seen from the front in FIG. 1;

FIG. 3 is a partial side view of another embodiment of the present invention.

FIG. 4 is a partial side view of another embodiment of the present invention.

FIG. 5 is a partial side view of another embodiment of the present invention.

FIG. 6 is a partial side view of another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Carriage 2 ... Loading attachment 3 ... Main frame 4 ... Wheels 5 ... Connection frame 6 ... Rear frame 6a ... Rear wing 7 ... Front wing 7a ... Pin 7b ··· Tip 8 ··· Hook 8a ··· Pin 8b ··· Projection 8c ··· Pressing surface 8d ··· Guide roller 9 ··· Anti back 9a ··· Pin 9b ··· Projection 9c ··· Stop surface 10 ··· Work 11 ··· Chain conveyor 12 ··· Wheels 13 ··· Dog 15 ··· Rail 16 ··· Rail 17 ··· Post 18 ··· Hook 18c ··· Pressing surface 19: Anti back 19b: Projection 20: Front wing 20a: Pin 21: Hook 22: Anti back 22a: Pi 22b mounting hole 23 link 25 hook 26 anti back 27 connecting member 31 hook 31a pin 32 anti back 32a pin 33 ... Link 33a ... Mounting hole

Claims (7)

[Claims] 1. A wheel and a loading attachment are attached to a main frame, an anti-back is swingably attached via a pin attached to the main frame, and a front wing is attached via a pin attached to the main frame. The carriage is constructed by swingably attaching, and further, a hook is attached via a pin attached to the front wing, a dog is attached to the chain conveyor at a predetermined interval, and the dog is attached to the pressing surface of the hook and the anti-back. A power and free drive mechanism, wherein the dog pushes the pressing surface to move the carriage by moving the chain conveyor between the hook and the stop surface. The back swings upward, and the anti-back swings downward as the dog moves downward. In the power-and-free drive mechanism, characterized in that fitted with follow-up mechanism. 2. The power and free drive mechanism according to claim 1, wherein the follow-up mechanism comprises a projection attached to the hook and a projection attached to the anti-back, and the follow-up mechanism is attached to the anti-back by a projection attached to the hook. A power and free drive mechanism characterized in that the raised protrusion is pushed up. 3. The power and free drive mechanism according to claim 1, wherein a material having elasticity or a material that transmits a tensile force but does not transmit a compressive force is used as a connecting member to connect the hook and the anti-back. A power and free drive mechanism characterized in that a follow-up mechanism is configured by connecting the anti-back and the hook to raise the anti-back upward as the hook rises. 4. The power and free drive mechanism according to claim 1, wherein a pin attached to the hook and a pin attached to the anti-back are connected by a link to form a follow-up mechanism, and the link is raised when the hook is raised. Wherein the anti-back is pulled upward. 5. A wheel and a loading attachment are attached to a main frame, an anti-back is swingably attached via a pin attached to the main frame, and a front wing is attached via a pin attached to the main frame. The carriage is constructed by swingably attaching, and further, a hook is attached via a pin attached to the front wing, a dog is attached to the chain conveyor at a predetermined interval, and the dog is attached to the pressing surface of the hook and the anti-back. A power and free drive mechanism in which the dog pushes the pressing surface to cause the carriage to run by moving the chain conveyor between the front wing and the front wing. The anti-back swings upward and the anti-back swings with the front wing swinging downward. Power & free drive mechanism, characterized in that so as to swing downwardly, fitted with a follow-up mechanism. 6. The front wing and the anti-back drive mechanism according to claim 5, wherein a material having elasticity or a material that transmits a tensile force but does not transmit a compressive force is used as a connecting member. A power and free drive mechanism characterized in that a follow-up mechanism is formed by connecting the front back and the connecting member to pull the anti-back upward when the front back is raised. 7. The power and free drive mechanism according to claim 5, wherein a pin is attached to the front wing and a pin attached to the anti-back by a link to form a follow-up mechanism, and A power and free drive mechanism, wherein the link pulls up the anti-back in accordance with the upward swing.