JP6036382B2 - Synchronous cart - Google Patents

Description

  The present invention relates to a synchronous carriage that is used in a vehicle assembly line in which an operator assembles parts with respect to a vehicle being conveyed and is movable in synchronization with the vehicle.

Patent Document 1 describes a technique related to a synchronous carriage used in a vehicle assembly line.
The synchronous carriage is a carriage that conveys parts to be assembled to the vehicle and tools used for assembling the parts, and is configured to be able to move in synchronization with the vehicle. For this reason, the worker can receive parts and tools from the synchronous carriage at the position of the vehicle, and use the tools to assemble the parts on the vehicle.

JP 2002-114179 A

  However, for example, in the work of assembling the parts at a low position of the vehicle, the worker is often in the middle, increasing the burden on the worker.

  The present invention has been made to solve the above-mentioned problems, and the problem to be solved by the present invention is to eliminate the work of the middle waist by using the synchronous cart and reduce the burden on the operator. .

The above-described problems are solved by the inventions of the claims.
The invention of claim 1 is a synchronous cart that is used in a vehicle assembly line in which an operator assembles parts with respect to a vehicle being transported, and is movable in synchronization with the vehicle, the synchronous cart body unit, A chair that is folded or mounted in a state that can be folded or unfolded on the main body of the synchronous carriage, and that is configured so that an operator can sit in the unfolded position and perform component assembly work, and a force in the folding direction with respect to the chair. An urging mechanism that applies force, a deployment holding mechanism that holds the chair in the deployed position against the force of the urging mechanism, and a lock release mechanism that can release the holding state of the deployment holding mechanism in response to an operator's operation force The synchronous cart body is provided with a table configured to be able to be pulled out from the synchronous cart body in a state where parts to be assembled to the vehicle are placed, and the table Pull Characterized in that it is configured to utilize the operate can be deployed from the folded position the chair.

According to the present invention, when the operator deploys the chair against the force of the biasing mechanism, the chair is held in the deployed state by the function of the deployment holding mechanism. For this reason, the worker can sit on the chair and perform the part assembling work on the vehicle. Therefore, it is not necessary to be in the middle even when assembling the parts at a low position of the vehicle, and the burden on the operator can be reduced.
Further, after the work is finished, the chair is folded by the force of the urging mechanism by operating the lock release mechanism to release the holding state of the deployment holding mechanism.
Further, the drawer of the table and the unfolding of the chair can be performed simultaneously.

According to the invention of claim 2, the unlocking mechanism is configured to be able to release the holding state of the unfolding holding mechanism by the operation of returning the tool used for assembly of the parts to the tool holder. And
For this reason, the chair can be reliably folded at the stage when the assembly work of the parts is completed.
According to the invention of claim 3 , the synchronous cart body part includes a connecting bar that is connected to the vehicle by ascending, and the connecting bar ascends in conjunction with the operation of unfolding the chair from the folding position. It is comprised as follows.
For this reason, the operation | movement which raises a connection bar does not become troublesome.

  According to the present invention, the use of the synchronous carriage eliminates the middle waist work, and the burden on the operator can be reduced.

It is a model top view showing the folding state of the chair of the synchronous trolley | bogie which concerns on this Embodiment 1 of this invention, and the storage state of a table. It is a model perspective view showing the unfolded state of the chair of the said synchronous trolley | bogie, and a table. It is a model perspective view showing the folding state of the chair of the said synchronous trolley | bogie, and the storage state of a table. It is a schematic diagram showing the relationship of the storing operation | movement of the said table, the folding operation | movement of a chair, and the downward movement operation | movement of a connection bar. It is a perspective view showing the folding state of a chair. It is a perspective view showing the unfolded state of a chair. It is a perspective view of the urging mechanism which applies force in the direction of a folding position to a chair. They are a side view (A figure) of the tool holder part of a lock release mechanism, and a lock release lever, a side view (B figure), such as a lock lever of a deployment holding mechanism, and a CC arrow line view (C figure) of B figure.

[Embodiment 1]
Hereinafter, based on FIGS. 1-8, the synchronous trolley | bogie which concerns on Embodiment 1 of this invention is demonstrated. A synchronous cart 10 according to the present embodiment is used in a vehicle assembly line in which an operator assembles components at a middle waist level with respect to a vehicle (not shown) that is conveyed at a constant speed at a predetermined height position. It is.
Note that front and rear, right and left, and upper and lower in the figure correspond to front and rear, left and right, and top and bottom of the synchronous carriage 10.

<About the outline of the synchronous cart 10>
As shown in FIGS. 1 to 3, the synchronous cart 10 includes a synchronous cart body 12 configured to move in synchronization with a vehicle (not shown) being conveyed. The synchronous cart body 12 is a cart formed in a square frame shape, and wheels 13 are mounted at the four corner positions of the synchronous cart body 12. In addition, a chair 30 is mounted on the synchronous cart body 12 in a state of being folded at the right rear portion of the synchronous cart body 12, and is synchronized with the vehicle in a state in which the chair 30 can move up and down. A connection bar 40 for connecting the cart body 12 is provided. Further, inside the synchronous cart body 12, a part 20 to be assembled to the vehicle and a table 20 for storing the electric tool M are stored in a state that can be pulled out toward the front (right side).

<About the chair 30>
The chair 30 is configured such that an operator can sit in the unfolded state and move in synchronization with the vehicle together with the synchronous cart body 12. That is, the worker can perform the part assembling work on the vehicle while sitting on the chair 30. As shown in FIGS. 5 and 6, the chair 30 is connected to a horizontal support shaft 125 projecting rearward from the frame of the synchronous cart body 12 so as to be vertically rotatable. The horizontal support shaft 125 is provided at a height position where an operator is seated. As shown in FIG. 5, the horizontal support shaft 125 is a frame-like left leg portion that constitutes the left and right legs of the chair 30. 36. Here, a wheel 36 s is attached to the lower end of the left leg portion 36.
The chair 30 includes a seat portion 32 formed in the shape of a square plate. At the position of the base end portion (left end portion) of the seat portion 32, as shown in FIGS. A rear bearing 32y is provided. Then, the horizontal support shaft 125 of the synchronous cart body 12 is passed through the front bearing 32x and the rear bearing 32y of the seating section 32 so as to be relatively rotatable. For this reason, the seating portion 32 of the chair 30 can be turned up and down around the horizontal support shaft 125 of the synchronous cart body 12.

As shown in FIGS. 5 and 6, a frame-shaped right leg portion 34 that constitutes the front and rear right legs of the chair 30 can be rotated up and down at the right end (rotation free end) of the seating portion 32 of the chair 30. Linked in state. Further, a wheel 34 s is attached to the lower end of the right leg portion 34 in the same manner as the left leg portion 36. Here, the right leg 34 of the chair 30 is formed in the same size as the left leg 36. For this reason, the seating portion 32 rotates downward about the horizontal support shaft 125 of the synchronous cart body 12 and the seating portion 32 is held horizontally in a state where the wheels 34s of the right leg portion 34 are in contact with the floor surface. The operator can be seated. Further, as shown in FIG. 6 and the like, a backrest frame 32b is provided on the seating portion 32 so that an operator can safely sit on the rear end position.
Further, as shown in FIG. 7 and the like, a folding lever 33 is provided on the left end side of the seating portion 32 so as to project leftward from the position of the front bearing 32x. A retaining portion 33 x to which the folding wire 37 is connected is provided on the side surface of the folding lever 33.

As shown in FIGS. 4 and 7, the folding wire 37 includes a lower pulley 38d provided at the lower end of the frame of the synchronous cart body 12 and an upper portion provided at the upper end of the frame. It is hung on a pulley 38u. The end (base end) of the folding wire 37 on the lower pulley 38 d side is connected to the retaining portion 33 x of the folding lever 33 of the seat portion 32. Further, the end (front end) of the folding wire 37 on the upper pulley 38 u side is connected to the weight 39. As a result, the folding lever 33 of the seating portion 32 is pulled down by the weight of the weight 39, and the seating portion 32 pivots upward about the horizontal support shaft 125 of the synchronous cart body 12 (two-dot chain line in FIG. 4). reference). Thereby, the chair 30 comes to be folded by the force resulting from the weight of the weight 39 (see FIG. 5). Further, as will be described later, when the weight 39 is pulled up, the folding wire 37 is loosened, and the seat 32 is centered on the horizontal support shaft 125 of the synchronous cart body 12 by the force of its own weight and the weight of the right leg 34. Then, the chair 30 is deployed downward (see FIG. 6).
Further, as shown in FIG. 4, the connection bar 40 is connected to the weight 39 so as to be able to move up and down together with the weight 39.
That is, the weight 39, the folding wire 37, the lower pulley 38d, and the upper pulley 38u correspond to an urging mechanism that applies force in the folding direction to the chair in the present invention.

<About Table 20>
As shown in FIGS. 1 to 3 and the like, the table 20 includes a table body 22 having a rectangular frame shape, and an upper bearing 24 is vertically fixed to a corner of the table body 22. And as shown in FIG. 3 etc., the upper part of the rotation center vertical axis | shaft 121 of the synchronous trolley | bogie main-body part 12 is penetrated by the upper bearing 24 of the table 20 in the state which can be rotated relatively. As a result, the table main body 22 can be horizontally rotated around the rotation center vertical axis 121 of the synchronous cart main body 12, and from the storage position stored in the synchronous cart main body 12 as shown in FIG. 1. It can be pulled out to the use position shown in FIG.
Further, as shown in FIG. 3, the rotation center vertical axis 121 of the synchronous cart body 12 has a lower portion of the rotation center vertical axis 121 inserted into the lower bearing 26. The rotation free end side is connected by an oblique support rod 27. That is, the rotation free end side of the table body 22 is supported from below by the lower bearing 26 and the oblique support rod 27.

The table main body portion 22 is formed in a rectangular shape including a long side portion 22e and a short side portion 22s. As shown in FIG. 3, an operator places a table main body portion on the short side portion 22s on the free rotation end side. A handrail portion 22z that is gripped when pulling out 22 is provided. Further, the table body 22 is provided with a container 22y for storing components to be assembled to the vehicle in the vicinity of the long side portion 22e on the upper bearing 24 side.
Further, as shown in FIG. 1 and FIG. 2, the long side portion 22e opposite to the container 22y of the table body portion 22 is provided with a retaining bracket 22k, and the weight lifting mechanism 50 is lifted to the retaining bracket 22k. The wire 52 is connected.
As shown in FIG. 1, the weight lifting mechanism 50 folds the chair 30 using a force that pulls the table body 22 from the storage position stored in the synchronous cart body 12 to the use position shown in FIG. 2. This is a mechanism for lifting the weight 39 used. As shown in FIG. 4, the weight lifting mechanism 50 is attached to the frame of the synchronous carriage main body 12 and the lifting wire 52 that transmits the rotation operation of the table main body 22 to the weight 39. And the pulley 54. One end of the pulling wire 52 is connected to the holding metal fitting 22 k of the table body 22, and the other end of the pulling wire 52 is connected to the weight 39. For this reason, by pulling out the table main body 22 from the storage position of the synchronous cart main body 12 to the use position (see FIG. 2), the pulling wire 52 is pulled and the weight 39 is pulled up. As a result, the chair 30 is deployed as described above.
For this reason, a pulling force due to the weight of the weight 39 is always applied to the table main body portion 22 through the lifting wire 52 of the weight lifting mechanism 50 in the storage position direction.

<About the deployment holding mechanism 70>
Between the lower bearing 26 of the table 20 and the frame of the synchronous cart body 12, the table body 22 is pulled out to the use position as shown in FIG. A deployment holding mechanism 70 that holds the chair 30 in the deployed position by holding the chair 30 in the deployed position is provided.
As shown in FIG. 8B, the deployment holding mechanism 70 includes a lock lever 72 that is provided on the lower bearing 26 of the table 20 and configured to be able to rotate together with the table main body 22. The lock lever 72 is formed in a horizontal bar shape, and the base end portion of the lock lever 72 is connected to the side surface of the lower bearing 26 of the table 20 so as to be vertically rotatable. The lock lever 72 is configured so as to be able to rotate between a horizontal lock position and a lock release position inclined so that the tip side becomes higher, and is held at the horizontal lock position by the force of a spring (not shown). . Further, a retaining bracket 72 x is provided on the upper side surface of the lock lever 72. The lock release wire 67 of the lock release mechanism 60 (described later) for rotating the lock lever 72 upward against the spring force is connected to the retaining bracket 72x of the lock lever 72.
As shown in FIG. 8B, the synchronous cart body 12 is provided with a horizontal center shaft 127 extending in the front-rear direction at a predetermined position, and a substantially horizontal L-shaped flange portion 127k is provided on the horizontal center shaft 127. Is provided. As shown in FIGS. 8B and 8C, the table main body 22 is pulled out to the use position as shown in FIG. The table body 22 is held in the use position against the weight of the weight 39 by engaging with the flange 127k of the synchronous cart body 12 by the force of the spring.

<Regarding the unlocking mechanism 60>
The lock release mechanism 60 is a mechanism for releasing the use position holding state of the table main body 22 by the deployment holding mechanism 70 and the deployment state of the chair 30. As shown in FIG. 8A and the like, the lock release mechanism 60 includes a lock release lever 62 provided on the rotation free end side of the table body 22. The lock release lever 62 is a lever provided with a tool holder 62h for storing the electric tool M at the tip, and a lateral bearing 62j is provided at an intermediate position in the longitudinal direction. The support shaft 63 of the table body 22 is inserted into the bearing 62j of the lock release lever 62 so as to be relatively rotatable. In other words, the lock release lever 62 is mounted on the table body 22 so as to be pivotable up and down around the support shaft 63.
A spring receiver 62 b is provided between the tool holder 62 h of the lock release lever 62 and the bearing portion 62 j, and a coil spring 64 is mounted between the spring receiver 62 b and the frame 22 f of the table main body 22. The coil spring 64 is biased so that the tool holder 62h of the lock release lever 62 is pulled upward to hold the lock release lever 62 horizontally.

Further, a retaining bracket 62x is attached to the proximal end portion of the unlocking lever 62, that is, the opposite side of the tool holder 62h, and one end of the unlocking wire 67 is connected to the retaining bracket 62x. As described above, the other end of the unlocking wire 67 is connected to the retaining bracket 72x of the lock lever 72 of the deployment holding mechanism 70 as shown in FIG. 8B. The unlocking wire 67 is held in a state where it is hung on a plurality of pulleys 54 attached to the frame of the table body 22.
With the above configuration, when the operator returns the electric tool M to the tool holder 62h of the lock release lever 62 and presses down the tool holder 62h against the spring force of the coil spring 64, the lock release lever 62 is moved as shown in FIG. By turning to the left, the retaining bracket 62x of the unlocking lever 62 is pulled up. Thereby, the lock release wire 67 is pulled by the lock release lever 62, and the lock lever 72 of the deployment holding mechanism 70 is pulled upward against the force of the spring (see the two-dot chain line in FIG. 8B). As a result, the distal end of the lock lever 72 of the deployment holding mechanism 70 is disengaged from the flange 127k of the synchronous cart body 12 and the table main body 22 is stored in the synchronous cart body 12 by the pulling force caused by the weight of the weight 39. It becomes possible to move in the direction (left rotation in FIG. 2).

<About operation | movement of the synchronous trolley | bogie 10>
Next, operation | movement of the synchronous trolley | bogie 10 in a vehicle assembly line is demonstrated.
When the synchronous cart 10 is used, as shown in FIGS. 1 and 3, the chair 30 is held in the folding position by the action of an urging mechanism such as a weight 39 and a folding wire 37. The table body 22 of the table 20 is held at a position (stored position) stored in the synchronous cart body 12 by the action of the weight 39, the pulling wire 52, and the like. Further, the connecting bar 40 is held at the lower limit position together with the weight 39.
In this state, the operator moves the synchronous cart body 12 to the bottom of the vehicle, pulls the table body 22 forward with the handrail portion 22z of the table body 22. That is, the table main body 22 is rotated to the right around the rotation center vertical axis 121 from the storage position shown in FIG. Thereby, the pulling wire 52 of the weight pulling mechanism 50 is pulled by the table main body 22 and the weight 39 is pulled up.
Then, when the table main body 22 is rotated about 90 ° to the use position shown in FIG. 2, the lock lever 72 of the deployment holding mechanism 70 provided in the table main body 22 is shown in FIGS. 8B and 8C. Thus, it engages with the flange 127k of the synchronous cart body 12. Thereby, the table main body 22 is held at the use position shown in FIG. 2 against the pulling force of the pulling wire 52 caused by the weight of the weight 39.
Furthermore, the weight 39 is pulled up to the upper limit position by rotating the table main body 22 to the right by about 90 ° to the use position. As a result, the connecting bar 40 rises to the upper limit position together with the weight 39, and the upper end portion of the connecting bar 40 is engaged with the vehicle. Thereby, the synchronous cart body 12 moves in synchronization with the vehicle.

Further, in the process of raising the weight 39, the folding wire 37 of the chair 30 shown in FIG. 4 is loosened, and the seating portion 32 and the folding lever 33 of the chair 30 are self-weighted and the right leg portion 34 of the seating portion 32. It rotates downward (right rotation) about the horizontal support shaft 125 with the same weight. That is, the chair 30 is unfolded while the weight 39 is raised. And before the weight 39 raises to an upper limit position, the wheel 34s of the right leg part 34 of the chair 30 contact | abuts on a floor surface, and as shown in FIG. 6, the chair 30 expand | deploys completely.
That is, the deployment holding mechanism 70 that holds the table body 22 in the use position functions as the deployment holding mechanism of the present invention that holds the chair 30 in the deployment position.
Next, in this state, the operator sits on the chair 30, takes parts from the container 22 y of the table 20 (table body 22), takes the electric tool M from the tool holder 62 h of the table body 22, and The assembly work of the parts is performed on the vehicle.
And after completion | finish of work, it stands up, returns the electric tool M to the tool holder 62h, and presses the tool holder 62h below.

As a result, the lock release lever 62 of the lock release mechanism 60 pulls the lock release wire 67, and as shown in FIG. 8B, the lock release wire 67 resists the lock lever 72 of the deployment holding mechanism 70 against the spring force. And pull it up. As a result, the distal end of the lock lever 72 of the deployment holding mechanism 70 is disengaged from the flange 127k of the synchronous cart body 12. That is, the table holding state of the deployment holding mechanism 70 is released, and the table main body portion 22 moves in the direction in which it is stored in the synchronous cart main body portion 12 by the pulling force caused by the weight of the weight 39 (left-turned in FIG. 2). .
Further, when the weight 39 is lowered, the connection bar 40 is lowered, and the engagement between the connection bar 40 and the vehicle is released.
Further, as the weight 39 is lowered, as shown in FIG. 4, the folding lever 33 of the chair 30 is pulled downward via the folding wire 37, and the seating portion 32 of the chair 30 is moved to the synchronous cart body 12. It rotates upward about the horizontal support shaft 125. Thereby, the chair 30 is folded by the force resulting from the weight of the weight 39, and a series of work is completed.

<Advantages of the synchronous cart 10 according to the present embodiment>
According to the synchronous cart 10 according to the present invention, the operator deploys the chair 30 against the force of the biasing mechanism (the weight 39 or the like), so that the chair 30 is held in the deployed state by the function of the deployment holding mechanism 70. The For this reason, the worker can sit on the chair 30 and perform the part assembling work on the vehicle. Therefore, it is not necessary to be in the middle even when assembling the parts at a low position of the vehicle, and the burden on the operator can be reduced.
Further, after the work is completed, the chair 30 is folded by the force of the urging mechanism (the weight 39 or the like) by operating the lock release mechanism 60 to release the holding state of the deployment holding mechanism 70.
In addition, since the chair 30 can be deployed using the operation of pulling out the table 20 (table body 22), the drawer of the table 20 and the deployment of the chair 30 can be performed simultaneously.
Further, the lock release mechanism 60 is configured such that the operator can release the holding state of the deployment holding mechanism 70 by an operation of returning the electric tool M used for assembling the parts to the tool holder 62h. For this reason, the chair 30 comes to be able to be folded reliably at the stage which the assembly | attachment operation | work of components was complete | finished.
Moreover, since the connection bar 40 is configured to rise in conjunction with the operation of the chair 30 being deployed, the operation of raising the connection bar 40 is not troublesome.

<Example of change>
Here, the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention. For example, in the present embodiment, the example in which the weight 30 is pulled up via the pulling wire 52 and the chair 30 is expanded by the operation of pulling out the table main body portion 22 from the storage position to the use position is shown. However, if the table main body portion 22 is configured to be able to rotate from the storage position to the use position under its own weight, the weight 39 is pulled up by the operation of unfolding the chair 30 and the pull-up wire 52 is loosened, so It can be made to rotate to the use position.
Furthermore, in the present embodiment, an example in which the weight 39 is used is shown, but a spring can be used instead of the weight 39.

<Draft additional claim>
1) A synchronous cart as set forth in claim 1,
It is provided in the synchronous cart body, and includes a table configured so that it can be pulled out from the synchronous cart body in a state where parts to be assembled to the vehicle are placed,
A synchronous carriage configured to pull up a weight of a biasing mechanism that applies a force in a folding direction to the chair by using an operation of pulling out the table, and to deploy the chair from a folding position. .
2) A synchronous cart according to either claim 1 or claim 2,
The deployment holding mechanism that holds the chair in the deployed position against the force of the urging mechanism includes a lock lever of the table and a flange portion of the synchronous carriage main body, and the lock lever is engaged with the flange portion. It is configured to hold the table in the drawer position by combining the chairs into the unfolded state,
The lock release mechanism can release the engagement state of the lock lever and the hook and release the holding state of the deployment holding mechanism by returning the tool used for assembling the parts to the tool holder by the operator. Synchronous cart characterized by being configured to.
3) The synchronous cart according to any one of claims 1 to 3, wherein
The synchronous cart body includes a connecting bar that is connected to the vehicle by ascending,
The connection bar is configured to be lifted together with an operation of unfolding the chair from a folding position by being pulled up together with a weight of the urging mechanism by an operation of pulling out the table. Trolley.

12 ... Synchronous cart body 20 ... Table 22 ... Table body 30 ... Chair 37 ... Folding wire (biasing mechanism)
39... Weight (biasing mechanism)
40... Connection bar 60... Unlocking mechanism 62... Unlocking lever 62 h... Tool holder 70. 127k ・ ・ ・ Human M ・ ・ ・ ・ ・ ・ Electric tool (tool)

Claims (3)

A synchronous carriage that is used in a vehicle assembly line in which an operator assembles parts to a vehicle being transported and is movable in synchronization with the vehicle;
Synchronous cart body,
A chair that is folded or mounted in a state that can be folded or deployed in the synchronous cart body, and is configured so that an operator can sit down and perform component assembly work in the deployed position;
An urging mechanism that applies force in the folding direction to the chair;
A deployment holding mechanism that holds the chair in a deployed position against the force of the biasing mechanism;
It has a lock release mechanism that can release the holding state of the deployment holding mechanism in response to the operator's operating force ,
The synchronous cart body is provided with a table configured to be pulled out from the synchronous cart body in a state where parts to be assembled to the vehicle are placed,
A synchronous carriage configured to be able to unfold the chair from a folding position by using an operation of pulling out the table . It is a synchronous trolley | bogie described in Claim 1, Comprising:
The synchronous unlocking mechanism is configured so that the holding state of the unfolding holding mechanism can be released by an operation of returning the tool used for assembling the parts to the tool holder by the operator . A synchronous carriage according to claim 1 or claim 2,
The synchronous cart body includes a connecting bar that is connected to the vehicle by ascending,
The synchronization bar, wherein the connecting bar is configured to rise in conjunction with an operation in which the chair is unfolded from a folding position .

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