JPH0347792Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a heavy object loading device.

(Prior Art) On an automobile assembly line, when heavy objects such as engine assemblies or suspension assemblies are assembled and mounted from the bottom of the car body suspended from the ceiling, A jack-type heavy object loading device is used to push the heavy objects up towards the vehicle body. It is necessary to move the vehicle in the horizontal direction (in two directions: the vehicle body transport direction and the vehicle width direction). Equipped with a sliding mechanism,
This is equipped with a manual heavy load loading device that is manually operated, and a slide mechanism that is directly driven by a hydraulic cylinder as disclosed in Japanese Patent Application Laid-Open No. 59-206266. 2. Description of the Related Art Automatic heavy object loading devices that are automatically controlled by electrical means are known.

By the way, it is obvious that the automatic heavy object loading device is more advantageous among the above two types of heavy object loading devices when aiming at automation and labor saving in the assembly line.

However, as in the above-mentioned known automatic heavy load loading device, the horizontal movement of the heavy load is performed by a slide mechanism that is directly driven by the expansion and contraction force of a hydraulic cylinder, and this is automatically controlled by electrical means. For example, in the case of a failure in the control circuit, the slide mechanism cannot be manually operated because it is equipped with a hydraulic cylinder that cannot be operated manually, making it impossible to continue assembly work. Become. Therefore, if the above-mentioned loading work is to be continued while the malfunctioning part is being repaired, the work must be moved to an emergency auxiliary assembly line set up outside the regular assembly line, and heavy objects must be moved to the auxiliary assembly line for emergencies. There was a problem with poor operability and workability during loading work.

(Purpose of the invention) The present invention is an attempt to solve the problems pointed out in the prior art section above, and it is possible to move the loaded object in the horizontal direction by either manual or automatic operation. It is an object of the present invention to provide a heavy object loading device which is designed to improve operability and workability in heavy object loading work.

(Means for Achieving the Object) As a means for achieving the above object, the present invention has a slide mechanism that can move the loaded object at least in the front-rear direction and left-right direction with respect to the loaded object. In the heavy object loading device, the slide mechanism includes at least a pair of slide members that are relatively slidable in the front-rear direction or the left-right direction in a horizontal plane, and one of the slide members of the pair of slide members a rack gear extending in the sliding direction,
A pinion gear that meshes with the rack gear and is driven by an appropriate drive source is attached to the other slide member, and a power transmission path between the rack gear and the drive source is connected between the rack gear and the drive source. - An appropriate power transmission path disconnection mechanism is provided that acts to disconnect the power transmission path.

(Function) In the present invention, by the above means, the power transmission path between the rack gear and the drive source is connected to each other by the power transmission path disconnection mechanism interposed between the rack gear and the drive source. In this case, the rack and pinion mechanism and the drive source are directly connected, and automatic operation of the slide member by the drive source is realized.On the other hand, when the power transmission path disconnection mechanism is in the disconnected state, the power from the drive source to the rack gear is Since the transmission path is cut off, the rack and pinion mechanism can operate freely, and the slide member can be freely moved manually regardless of the operation of the drive source.

(Embodiment) Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. 1 to 7.

(: First Embodiment) (-a: Configuration) FIG. 1 shows a heavy object loading device Z according to a first embodiment of the present invention. This heavy object loading device Z is designed for a vehicle body Y (corresponding to a loaded object within the scope of a utility model registration claim) that is intermittently transported with the ceiling side suspended by a carrier device.
This is for mounting the engine assembly a first slide mechanism 2 for horizontally moving the engine assembly X in the longitudinal direction (vehicle width direction of the vehicle body); transportation)
The engine assembly includes a second slide mechanism 3 for horizontally moving the engine assembly X in a horizontal direction, and a rotation mechanism 4 for rotating the engine assembly X in a horizontal plane.

As shown in FIGS. 1 and 2, the elevating mechanism 1 includes an elevating support 17 of an appropriate length within a fixed support 16 that is erected and fixed on a base 15 so that it can extend and contract along the fixed support 16. In addition to inserting the fixed support 16
A lifting hydraulic cylinder 10 is attached via a connecting pin 19 between an end plate 18 provided at the upper end and the lifting column 17, and the lifting column is expanded and contracted by extending and contracting the lifting hydraulic cylinder 10. 17 can be raised and lowered.

As shown in FIGS. 1 to 4, the first slide mechanism 2 includes a base plate 5 that is fastened and fixed onto the end plate 18 of the elevating mechanism 1, and a first slide plate that is disposed facing above the base plate 5. It consists of 6. The base plate 5 and the first slide plate 6 have a pair of left and right guide bars 21, 21 provided on both sides of the upper surface of the base plate 5, and a pair of left and right guide bars 21, 21 provided on both sides of the lower surface of the first slide plate 6 and spaced appropriately in the front and back direction. A total of four first guide receivers 35, two on each side, are arranged.
35... are slidably fitted into the receiving grooves 35a, 35a..., respectively, so that they are relatively movable in the front-back direction. The relative movement between the base plate 5 and the first slide plate 6 is controlled by a motor 25 (utility model registration claims) provided on the base plate 5 side with a pinion gear 27 that meshes with a rack gear 39 provided on the lower surface of the first slide plate 6. (corresponding to the drive source inside). Further, between the motor 25 and the pinion gear 27, there is provided a clutch mechanism 26 that functions as a power transmission path disconnection mechanism for connecting and disconnecting the power transmission path from the drive source to the rack gear. The operation mode of the first slide mechanism 2 can be selectively switched between automatic operation and manual operation by connecting and disconnecting the clutch mechanism 26. That is, when the clutch mechanism 26 is in the connected state, the pinion gear 27 and the motor 25 are directly connected, and the pinion gear 27 is connected to the motor 25.
It is rotated by receiving the rotational force of (automatic operation).
On the other hand, when the clutch mechanism 26 is in the disengaged state, the pinion gear 27 is disconnected from the motor 25, so the pinion gear 27 remains engaged with the rack gear 39 and its operation is in a free state, so that manual effort is not required. By applying a pushing and pulling force to the first slide plate 6, the first slide plate 6 can freely slide and displace with respect to the base plate 5 (manual operation).

Furthermore, the base plate 5 constituting the first slide mechanism 2 is attached to the first slide plate 6, and the base plate 5 includes a pair of front and rear origin indexing cylinders 22 facing outward in the sliding direction of the first slide plate 6. 22, and the first slide plate 6 also has the pair of origin indexing cylinders 22, 2.
A pair of front and rear stoppers 46, 46 which abut and engage with the abutting elements 23, 23 in the extended state of 2 are provided, respectively. The reference position (origin) of the base plate 5 and the first slide plate 6 in the front-rear direction is determined by extending the abutting elements 23 and 23 to abut and engage the corresponding stoppers 46, respectively.
Therefore, subsequent operation control of the first slide mechanism 2 is performed based on this reference position. or,
Whether this reference position was determined accurately is
Limit switch 30 provided on base plate 5
is confirmed by engaging the limit guide 40 provided on the lower surface side of the first slide plate 6.

As shown in FIGS. 2, 4, and 5, the second slide mechanism 3 is composed of the first slide plate 6 and a second slide plate 7 disposed oppositely above the first slide plate 6. has been done.
The first slide plate 6 and the second slide plate 7 of the second slide mechanism 3 are two on each side, which are arranged on both sides of the upper surface of the first slide plate 6 in the front and back direction and spaced apart appropriately in the left and right direction. Receiving groove 3 of four second guide receivers 36, 36...
6a, 36a...inside the second slide plate 7
A pair of front and rear guide bars 65, 65 arranged in the left-right direction on both sides of the lower surface in the front-rear direction are slidably fitted, respectively, thereby allowing relative movement in the left-right direction.

Further, the relative movement between the first slide plate 6 and the second slide plate 7 is similar to the case between the base plate 5 of the first slide mechanism 2 and the first slide plate 6, and the lower surface of the second slide plate 7 A pinion gear 45 meshing with a rack gear 60 disposed laterally on the side is a first
This is performed by rotating the slide plate 6 by a motor 43 (which corresponds to the drive source in the claims of the utility model registration) provided on the slide plate 6 side. Further, in this case, by applying the present invention, a clutch mechanism 44 functioning as a power transmission path disconnection mechanism is interposed between the pinion gear 45 and the motor 43, as in the case of the first slide mechanism 2 described above. It is. Therefore, by engaging and disengaging the clutch mechanism 44,
The operation mode of the second slide mechanism 3 is based on the motor 43.
It is possible to select between automatic operation by the motor 43 and manual operation by human power without relying on the motor 43.

Further, the reference positions (origins) of the first slide plate 6 and the second slide plate 7 are indexed by abutting elements 38, 38 of a pair of origin indexing cylinders 37, 37 provided on the first slide plate 6. A pair of stoppers 6 provided on the second slide plate 7
2 and 62, and this confirmation is performed by the limit switch 41 provided on the first slide plate 6 side engaging with the limit guide 61 provided on the second slide plate 7 side. It can be done.

In this embodiment, the base plate 5, the first slide plate 6, and the second slide plate 7 each correspond to the slide member within the scope of the claims of the utility model registration.

As shown in FIGS. 2 and 5, the rotation mechanism 4 is composed of the second slide plate 7 and a rotary table 8 disposed above the second slide plate 7 to face each other. This first slide plate 6
The second slide plate 7 is rotatable by a rotating shaft 56 attached to the first slide plate 6 facing upward at the substantially center thereof by a bearing portion 59 provided at the substantially center of the second slide plate 7. Horizontal positioning is performed by supporting the rotary table 8, and a total of seven support rollers 55, 55... attached to the second slide plate 7 side rollably contact the lower surface of the rotary table 8, so that the vertical positioning is performed. Directional positioning is being performed. On the other hand, a large wheel 67 is attached to the bearing portion 59 of the rotary table 8, and a small wheel 68 is attached to the motor 57 fixed to the second slide plate 7, and the large wheel 67 and the small wheel 68 are attached to each other. belt 58
is being passed around. Therefore, the rotary table 8 is rotatable in a horizontal plane about the rotary shaft 56 by the rotational force of the motor 57 transmitted through the belt 58. Further, in this case, a clutch 66 is interposed between the motor 57 and the small wheel 68, and the rotary table 8 is connected to the clutch 66.
is separated from the motor 57 by cutting it off,
Its free rotation is allowed.

The reference position of the second slide plate 7 and the rotary table 8 in the rotation direction can be confirmed by checking that the limit switch 63 provided on the second slide plate 7 side and the limit guide 64 provided on the rotary table 8 side are in the rotation direction. This is done by engaging. Incidentally, this rotary table 8 functions as a mounting table on which a pallet 9 on which the engine assembly X is mounted is placed.
is accurately fixed in a predetermined position by a suitable fixing device (not shown) provided on the rotary table 8. Further, the pallet 9 and the base material 13 of the engine assembly X are always positioned and held in proper positions by a positioning mechanism (not shown) provided on the pallet 9 side. Therefore, when the engine assembly X is placed on the rotary table 8 via the pallet 9, the engine assembly The Rukoto.

Note that nut runners 1 are provided at four locations around the rotary table 8 for fastening the base material 13 of the engine assembly X to a predetermined position on the vehicle body Y.
1, 11... are attached.

Further, in FIG. 1, reference numeral 12 indicates a bellows provided on the outside of the telescopic portion of the elevating mechanism 1.

(-b: How to use and its effects) When installing the engine assembly The engine assembly X is placed on the rotary table 8 via a pallet 9 while being positioned at the reference position.

When the vehicle body Y stops at a predetermined position on the heavy object loading device Z, the heavy object loading device Z
Installation of engine assembly X begins. That is, the lifting hydraulic cylinder 10, the two sliding motors 25, 43, and Rotating motor 5
By controlling the operation of 7, the engine assembly X is pushed upward into the engine compartment while avoiding the existing members on the vehicle body Y side and without interfering with them. When the engine assembly Securely fasten and fix in place.

Mounting the engine assembly X on the vehicle body Y side.
When the fixing is completed, each operating part of the heavy object loading device Z operates again based on automatic control by the controller, and the rotary table 8 descends while avoiding each existing member on the vehicle body side and returns to the initial position, and the next time Prepare for loading work. The installation work is now complete.

On the other hand, if an electrical system failure occurs during loading work and automatic control of the heavy object loading device Z becomes impossible, the clutch mechanism 26 of the first slide mechanism 2 and the clutch of the second slide mechanism 3 Both the mechanism 44 and the clutch 66 of the rotation mechanism 4 are disconnected to remove the first slide mechanism 2 and the second slide mechanism 3.
The operating mode of the rotation mechanism 4 is all switched to manual operation, and the hydraulic control circuit of the lifting hydraulic cylinder 10 is switched from the automatic control circuit side to the manual control circuit side.

In this way, when the control of each part is switched to the manual operation method, the operator can easily manually control the movement of the first slide mechanism 2 and the second slide mechanism 3 and adjust the rotation angle of the rotation mechanism 4, respectively. Furthermore, the amount of expansion and contraction of the lifting hydraulic cylinder 10 can be adjusted by manually switching the control valve. Therefore, it is possible to continue mounting the engine assembly X onto the vehicle body Y regardless of a failure in the control circuit.

Therefore, there is no need to stop work until the malfunction is fixed or to move the work position to a separate emergency line, resulting in a high level of work efficiency (availability).
can be obtained, which can contribute to cost reduction.

(:Second Embodiment) The heavy object loading device of the second embodiment differs only in the configuration of the power transmission path disconnection mechanism, and the other configurations are almost the same as the heavy object loading device of the first embodiment. They have similar configurations. That is, the power transmission path disconnection mechanism of this embodiment is different from the power transmission path disconnection mechanism of the first embodiment described above, in which the power transmission path disconnection mechanism is configured with a clutch interposed between the pinion gear and the motor, and the clutch connects the pinion gear with the motor. In contrast, the motor itself can be moved forward and backward in its axial direction, and the pinion gear can be moved integrally with the motor in the width direction of the rack gear, allowing the pinion gear and the rack gear to be connected to each other. The structure is such that the two can be brought into engagement or disengagement. This will be explained in more detail using the power transmission path disconnection mechanism on the first slide mechanism 2 side as an example.
As shown in FIGS. 6 and 7, this power transmission path disconnection mechanism directly connects a pinion gear 27 to a motor 25, and connects the motor 25 to a rack gear 39.
It is fixed on a slide plate 71 which is slidable in the width direction (arrow A-B direction), and the slide plate 71 is further slid in the arrow A-B direction by a cylinder 72. be.

Therefore, when the cylinder 72 is extended, the motor 25
At the same time, the pinion gear 27 integrally moves in the direction of arrow A and meshes with the rack gear 39, and the motor 2
5, automatic operation is possible. On the other hand, when the cylinder 72 is contracted, the pinion gear 27
The meshing state between the motor 25 and the rack gear 39 is released, and the rack gear 39 is separated from the motor 25 and its operation becomes free. That is, a pair of slide members 5,
The slide members 5 and 6 can be freely moved relative to each other, and the slide members 5 and 6 can be manually operated.

It goes without saying that the power transmission path disconnection/disconnection mechanism of this second embodiment also provides the same functions and effects as those of the first embodiment.

It should be noted that each component in FIGS. 6 and 7 is given a reference numeral corresponding to each component shown in FIGS. 2 and 3, and a detailed explanation thereof will be omitted.

(Effect of the invention) The present invention provides a heavy object loading device having a sliding mechanism that can move the loaded object at least in the front-rear direction and left-right direction with respect to the loaded object. Consisting of at least a pair of slide members that can be slid relatively in the front-rear direction or left-right direction, one of the pair of slide members has a rack gear extending in the sliding direction, and the other slide member has a rack gear extending in the sliding direction. A pinion gear meshing with the rack gear and driven by an appropriate drive source is installed, and an appropriate power is provided between the rack gear and the drive source to connect/disconnect the power transmission path between the rack gear and the drive source. It is characterized by providing a transmission path disconnection mechanism.

Therefore, according to the heavy object loading device of the present invention, the operation mode of the slide member can be selected between two modes: automatic operation using the drive source and manual operation using manual force, by the connection/disconnection operation of the power transmission path connection/disconnection mechanism. Therefore, if the control circuit fails during automatic operation and control becomes impossible, the power transmission path disconnection mechanism is activated to immediately change the operation mode of the slide member. It is possible to continue work by changing from automatic operation to manual operation, and for example, the structure is such that manual operation is not possible, such as the conventional heavy object loading device disclosed in Japanese Patent Application Laid-Open No. 59-206266. The effect is that the operability and workability in loading heavy objects are improved compared to the conventional method.

[Brief explanation of drawings]

Fig. 1 is an overall view of the heavy object loading device according to the first embodiment of the present invention, Fig. 2 is an enlarged view of the head of the heavy object loading device shown in Fig. 1, and Fig. 3 is the same as that shown in Fig. 2. −
4 is a view in the - direction of FIG. 2, FIG. 5 is a view in the - direction of FIG. 2, and FIG. 6 is a view in the direction of the - arrows in FIG.
FIG. 7 is an enlarged view of the head of the heavy object loading device according to the embodiment, and is a view taken along the - arrow in FIG. 1... Lifting mechanism, 2, 3... Slide mechanism, 4
... Rotation mechanism, 5, 6, 7 ... Slide member, 8
... Rotating table, 9 ... Pallet, 10 ... Hydraulic cylinder for lifting, 11 ... Nut runner, 2
5, 43... Motor (drive source), 26, 44...
Clutch, 27, 45...Pinion gear, 39,
60...Rack gear, 71...Slide plate, 72
...Cylinder, X...Engine assembly, Y
...Car body.

Claims (1)

[Scope of utility model registration request] A heavy object loading device having a sliding mechanism capable of moving a loaded object at least in the front-rear direction and left-right direction with respect to the loaded object, wherein the slide mechanism moves relative to the loaded object in the front-rear direction or left-right direction It is composed of at least a pair of slide members capable of slidingly displacing the slide member, and furthermore, of the pair of slide members, a rack gear extending in the sliding direction of one of the slide members meshes with the rack gear of the other slide member, and A pinion gear driven by a drive source is installed, and an appropriate power transmission is provided between the rack gear and the drive source, which acts to connect/disconnect the power transmission path between the rack gear and the drive source. A heavy object loading device characterized by being provided with a path disconnection mechanism.