JP2019077389A - Component conveyance truck - Google Patents

Abstract

To make it possible chiefly to lock a free wheel without spending time and effort.SOLUTION: In a component conveyance truck 1, a first steering frame 4 having a pair of left and right free wheels 3 which are horizontally turnable and a second steering frame 6 having a pair of left and right stationery wheels 5 are so located below a truck body 2 as to be separated front and rear in a direction x of travel and are respectively supported so as to be horizontally rotatable, and the first steering frame 4 and the second steering frame 6 are so connected by a steering link 7 as to be rotated in directions opposite to each other, thereby enabling four-wheel steering. A lock mechanism 51, which can perform locking and unlocking of horizontal turning of the left and right free wheels 3 individually, is provided, and further, left and right independent lock operation mechanisms 52, which can individually operate each lock mechanism 51 of the left and right free wheels 3, are provided in the first steering frame 4.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a component transport carriage.

  In order to transport parts in a factory, a parts transport carriage is used (see, for example, Patent Document 1). The component conveyance truck of Patent Document 1 is provided at its lower portion with a free wheel (turning wheel) which can be horizontally pivoted about a vertical axis.

  When it is desired to restrict the horizontal turning of the free wheel, the left and right free wheels are simultaneously locked by using a restricting member.

Unexamined-Japanese-Patent No. 1-80870 gazette

  However, in the component conveyance cart described in Patent Document 1 described above, since the restriction member performs locking by simultaneously aligning the directions of the left and right free wheels with the lock position, the locking takes time and effort. .

  Therefore, the present invention is mainly intended to solve the above-mentioned problems.

In order to solve the above problems, the present invention is
A first steering frame having a pair of left and right free wheels capable of horizontal turning, and a second steering frame having a pair of left and right fixed wheels;
At the lower part of the bogie main body, they are arranged separately in the front and back of the traveling direction, and they are horizontally rotatably supported,
In the parts transport bogie, in which the first steering frame and the second steering frame are coupled by a steering link so as to rotate in the opposite direction to each other and four-wheel steering is possible,
There is provided a lock mechanism capable of individually locking and unlocking horizontal turning of the left and right free wheels.
In the first steering frame, lock operation mechanisms capable of individually operating the respective lock mechanisms of the left and right free wheels are provided independently in the left and right.
Thereby, the left and right free wheels can be individually locked.

  According to the present invention, with the above-described configuration, it is possible to lock the free wheel without any trouble.

It is a whole perspective view of the components conveyance trolley concerning this embodiment. It is the whole perspective view which made the tow hook the sideways pulling state and looked at the components conveyance trolley of FIG. 1 from another direction. It is a whole perspective view which shows the state which four-wheel-steering the components conveyance trolley of FIG. FIG. 2 is an overall plan view of FIG. 1; FIG. 4 is an overall plan view of FIG. 3; It is a perspective view of the free wheel which has a lock mechanism. It is a whole side view of a parts conveyance trolley. It is the figure which looked at the components conveyance trolley from the side of a steering change lever (at the time of lock release of lock mechanism). It is the figure which looked at the components conveyance trolley from the side of a steering change lever (at the time of lock of lock mechanism). FIG. 9 is a partially enlarged side view of a first steering frame at the time of unlocking of a lock mechanism similar to FIG. 8; FIG. 10 is a partial enlarged side view of a first steering frame at the time of locking of a lock mechanism similar to FIG. 9;

Hereinafter, the present embodiment will be described in detail with reference to the drawings.
1 to 11 are for describing this embodiment.

  <Configuration> The configuration of this embodiment will be described below.

  First, in each drawing, an arrow indicating a direction is defined as a traveling direction x, a width direction y, and an up-down direction z. These directions will be described later.

In order to transport parts in a factory, a parts transport carriage 1 as shown in FIG. 1 (to FIG. 5) is used. This parts conveyance bogie 1 mainly has a bogie main body 2 and has a first steering frame 4 having a pair of left and right wheels (free wheels 3) and a pair of left and right wheels (fixed wheels 5) The second steering frame 6 is disposed at the lower part of the truck body 2 so as to be separated in the forward and backward directions of the traveling direction x.
Further, as shown in FIG. 3 (FIG. 5), the first steering frame 4 and the second steering frame 6 are respectively supported by the bogie main body 2 so as to be horizontally rotatable.
Then, the first steering frame 4 and the second steering frame 6 are connected by the steering link 7 so as to rotate in the opposite direction to each other so that four-wheel steering is possible.

  Here, the component conveyance carriage 1 is a pallet carriage or the like capable of conveying the components together with the component pallet 92 (see FIG. 7). Therefore, the bogie main body 2 is a horizontal and flat pallet mounting table having a shape (rectangular shape) and a size on which the component pallet 92 can be mounted. Left and right are both sides based on the center (width center line) in the width direction y of the bogie main body 2.

  The free wheel 3 is a horizontally pivotable wheel. As shown in FIG. 1 (FIG. 4), the first steering frame 4 is horizontally elongated extending in the width direction y of the bogie main body 2 when the four-wheel steering is not performed. The free wheels 3 are located on the left and right ends of the first steering frame 4.

  The fixed wheel 5 is a wheel fixed so as to face the front (traveling direction x) of the truck body 2 when four-wheel steering is not performed. The second steering frame 6 is horizontally elongated extending in the width direction y of the truck body 2 when the four-wheel steering is not performed.

  As shown in FIG. 4 (FIG. 5), the first steering frame 4 and the second steering frame 6 can be horizontally pivoted about vertical axes 11 and 12 at positions on the width center line of the bogie main body 2 respectively. Attached to

  The traveling direction x is the front-rear direction when the component transport carriage 1 travels straight, and is the front-rear direction of the carriage main body 2. The parts transport cart 1 has its front and back direction reversed depending on the working conditions. The width direction y is based on the bogie main body 2 and is a direction orthogonal to the above-described traveling direction x in a horizontal plane.

  The steering link 7 is on the opposite side of the first steering frame 4 and the second steering frame 6 with respect to the width center line of the bogie main body 2 and at a portion equidistant from the width center line. It connects between.

  In contrast to the basic configuration as described above, in this embodiment, the following configuration is provided.

(1) As shown in FIG. 6, the lock mechanism 51 capable of individually locking and unlocking the horizontal turning of the left and right free wheels 3 is provided.
Then, as shown in FIG. 7, as shown in FIG. 8 (FIG. 9), a lock operation mechanism 52 capable of individually operating each lock mechanism 51 of the left and right free wheels 3 in the first steering frame 4 is shown. Left and right independently provided (lock operation mechanism 52 (R) and lock operation mechanism 52 (L)).

  Here, the lock mechanisms 51 are provided separately for the left and right free wheels 3 respectively. The lock operation mechanism 52 is separately provided at the left and right positions of the first steering frame 4. Then, the lock mechanism 51 of the right free wheel 3 is operated by the right lock operation mechanism 52, and the lock mechanism 51 of the left free wheel 3 is operated by the left lock operation mechanism 52.

(2) Specifically, as shown in FIG. 6, a lock plate 53 fixed to the side of the first steering frame 4 by the lock mechanism 51;
A lock claw 54 provided on the side of the free wheel 3 so as to be able to move close to and away from the lock plate 53;
And biasing means 55 for biasing the lock claw 54 toward the lock plate 53.
The lock plate 53 has a sliding contact surface 56 on which the lock claw 54 can slide and rotate by the horizontal turning of the free wheel 3 and a claw locking portion 57 that the lock claw 54 locks when the free wheel 3 faces the front. Have.

  Here, the free wheel 3 has a mounting plate 61 for the first steering frame 4, a vertical rotation shaft 62, a roller holder 63, a roller 64, and a horizontal axle 65.

  The lock plate 53 is integrally provided on the mounting plate 61. The lock plate 53 has a sliding contact surface 56 on the lower surface side of which the lock claw 54 can slide in the circumferential direction. The claw locking portion 57 is a notch provided in the lock plate 53.

  The roller holder 63 is provided with a lock lever 67 mounted so as to be able to tilt up and down via a horizontal support shaft 66. The lock lever 67 is formed by bending a metal plate. The lock claw 54 is bent so as to project upward on the tip end side of the lock lever 67. An end portion of the lock lever 67 is an operation portion 67 a operated by the lock operation mechanism 52. At both end portions of the operation portion 67a, there are tapered portions with a downward slope for guiding the lock operation mechanism 52 (the first operation lever 71 thereof) to be placed thereon.

  The biasing means 55 is a coil spring. The biasing means 55 is a lock lever 67 and a fixing bracket 68 with the fixing bracket 68 fixed to the roller holder 63 and the rod-like tilting guide 69 extending upward from the fixing bracket 68 externally fitted to the tilting guide 69. And interpose in a compressed state. The lock lever 67 is biased upward by the biasing means 55. The lock lever 67 has a hole for passing the tilting guide 69 on the tip side.

  (3) As shown in FIG. 8 (FIG. 9), the first steering frame 4 has a steering switching lever 16 capable of simultaneously operating the lock operation mechanism 52 on the left and right.

  Here, the steering switching lever 16 may be of any type as long as the left and right lock operating mechanisms 52 can be operated simultaneously.

(4) As shown in FIG. 2, the steering switching lever 16 is used as a pulling hook 15 for pulling the truck body 2.
As shown in FIG. 1 and FIG. 2, the tow hook 15 is allowed to be raised and lowered.
Then, when the tow hook 15 is raised in the vertical direction as shown in FIG. 1, it is in the hand-pushed state, restricts four-wheel steering as shown in FIG. 4, and locks as shown in FIG. The horizontal turning of the free wheel 3 can be unlocked via the operation mechanism 52 and the lock mechanism 51.
Further, as shown in FIG. 2, when the tow hook 15 is turned to the side, the tow state is established, and the four-wheel steering is released as shown in FIG. 3 (FIG. 5). As shown, the horizontal turning of the free wheel 3 is switchable to be locked via the lock operation mechanism 52 and the lock mechanism 51.

  Here, the first steering frame 4 is provided with a manual handle 31. By making the tow hook 15 upset, the tow hook 15 can be stored inside the manual handle 31 or the manual handle It is possible to take out from the inside of 31.

  Then, by making the lock operation mechanism 52 and the lock mechanism 51 operable using the movement of raising and lowering the tow hook 15, the tow hook 15 has a function as the steering switching lever 16 or the like. A connecting portion 17 for hooking the tow hook 15 is provided at the same position opposite to the tow hook 15 of the unmanned traveling carriage or the carriage main body 2 of the component conveyance carriage 1.

  Further, as shown in FIG. 10 (FIG. 11), the steering switching lever 16 has a locking portion 23 which can be locked from above to a locking hole 22 provided in the carriage main body 2 and extending in the vertical direction z. . The locking hole 22 and the locking portion 23 constitute a standing and holding portion 18 capable of holding the steering switching lever 16 in a hand-held state in the vertical direction. This standing and holding portion 18 is a first for the carriage main body 2 The steering lock is a steering lock that can directly restrict the horizontal rotation of the steering frame 4.

(5) And, the lock operation mechanism 52
A first operation lever 71 for disengaging the lock claw 54 from the claw locking portion 57 of the lock plate 53 against the biasing force of the biasing means 55;
And a second operation lever 72 for transmitting the operation of the steering switching lever 16 to the first operation lever 71.

  Here, the first operation lever 71 is a member extending in the traveling direction x of the component conveyance carriage 1 when the first steering frame 4 is directed to the front by restriction of four-wheel steering. The first control lever 71 is pivotally supported so as to be vertically tiltable by a tilt center shaft 73 extending in the width direction y at the middle portion thereof. It is preferable in terms of balance that the tilting central shaft 73 be installed at a position at or around the longitudinal central portion of the first operating lever 71.

  Further, as shown in FIG. 8 (FIG. 9), the second control lever 72 extends in the width direction y of the component conveyance cart 1 when the first steering frame 4 is facing the front by the restriction of four-wheel steering. It is a member. The second operation lever 72 is pivotally supported so as to be vertically tiltable by a tilt center shaft 74 extending in the advancing direction x at the middle portion thereof. The tilt center shaft 74 is preferably installed at a position closer to the steering switching lever 16 (inside) than the central portion in the longitudinal direction of the second operation lever 72 in terms of balance.

  In addition, the end portion of the second operation lever 72 on the side of the steering switching lever 16 (inside) has an extension operation that extends upward as necessary in order to be operable by the base end portion 16b of the steering switching lever 16 A portion 75 is provided. The extension operation portion 75 has such a length that the base end portion 16 b (lower end portion) of the steering switching lever 16 held in the upright holding portion 18 in the vertical direction abuts.

  Then, as shown in FIG. 8, when the tow hook 15 is turned in the vertical direction, the base end 16 b of the tow hook 15 (steering switching lever 16) is provided at the inner end of the second operation lever 72 ( Push down the extension operation part 75). Therefore, the end on the opposite side (outside) of the second operation lever 72 is lifted. As a result, as shown in FIG. 10, the second operation lever 72 lifts the end on the same side of the first operation lever 71 from below, and lowers the end on the free wheel 3 side of the first operation lever 71. . As a result, the end on the free wheel 3 side of the first operation lever 71 lowers the lock lever 67 against the urging force of the urging means 55 constituting the lock mechanism 51, and the lock claw 54 The lock mechanism 51 is released by releasing it from the locking portion 57). Thereby, the free wheel 3 can be turned horizontally.

  On the other hand, as shown in FIG. 9, when the tow hook 15 is brought into a towed state in the sideways direction, the base end 16b of the tow hook 15 (steering switching lever 16) is provided at the inner end of the second operation lever 72 ( Leave the extension operation unit 75). Therefore, the end on the opposite side (outside) of the second control lever 72 is lowered. As a result, the second operating lever 72 separates downward from the end on the same side of the first operating lever 71, and the first operating lever 71 becomes free relative to the second operating lever 72. Then, as shown in FIG. 11, the end on the free wheel 3 side of the first operation lever 71 is lifted upward through the lock lever 67 by the biasing force of the biasing means 55 constituting the lock mechanism 51, and the lock is performed. The claws 54 are brought into pressure contact with the sliding contact surface 56 of the lock plate 53. After that, the free wheel 3 can be turned horizontally until the lock claw 54 locks to the claw engaging portion 57 of the lock plate 53, but when the free wheel 3 faces the front, the lock claw 54 is the lock plate It locks to the claw locking portion 57 of 53, and the lock by the lock mechanism 51 is engaged. Thereby, the horizontal turning of the free wheel 3 is restricted.

  In addition, as shown in FIG. 7, the component conveyance carriage 1 is provided at the lower part of the first steering frame 4 with a foot type floor lock 36 having a brake lever 37 and a brake pad 38.

  <Operation> The operation of this embodiment will be described below.

  For example, when the component conveyance carriage 1 is pushed manually (when pushed manually), the first steering frame 4 and the second steering frame 6 are fixed to the carriage main body 2. As a result, the component conveyance carriage 1 becomes a general carriage that does not perform four-wheel steering. At this time, by releasing the lock mechanism 51 of the free wheel 3 so that the free wheel 3 can be horizontally turned, the component transport carriage 1 can freely change its direction.

  Further, for example, when the component conveyance carriage 1 is towed using an unmanned traveling carriage or the like (at the time of pulling), the first steering frame 4 and the second steering frame 6 are horizontal with respect to the carriage main body 2 Make it rotatable. As a result, the first steering frame 4 and the second steering frame 6 rotate in opposite directions to each other by the steering link 7 connecting the first steering frame 4 and the second steering frame 6. The component conveyance carriage 1 is a four-wheel steering carriage. Since small turning is effective for four-wheel steering, even in a narrow space in a factory, the parts transport cart 1 can be freely moved using the unmanned travel cart. At this time, by locking the horizontal turning of the free wheel 3 by the lock mechanism 51, the component conveyance carriage 1 can travel stably.

  Then, at the time of manual pushing, the tow hook 15 is vertically oriented and stored inside the hand-operated handle 31, and at the time of towing, the tow hook 15 is taken out from the inner side of the hand-operated handle 31 and made horizontal. This allows the tow hook 15 to be unobtrusive when not in use and to be easily removed when in use.

  Further, switching of whether to perform four-wheel steering and locking / unlocking of the free wheel 3 can be performed simultaneously by inserting and removing the tow hook 15 having the function of the steering switching lever 16.

  <Effects> According to this embodiment, the following effects can be obtained.

  (Effect 1) When performing four-wheel steering, if three of the four wheels provided on the front, rear, left and right of the bogie are fixed, the remaining one wheel naturally follows the other wheels Therefore, four-wheel steering can be performed without particularly fixing.

  Therefore, the lock operation mechanisms 52 for the left and right lock mechanisms 51 are provided independently of each other. Then, the lock mechanisms 51 of the left and right free wheels 3 can be individually operated by the lock operation mechanisms 52 independent of the left and right. As a result, only one of the left and right free wheels 3 can be locked.

  Therefore, when switching to four-wheel steering, it is possible to eliminate the inconvenience of having to lock both of the left and right free wheels 3 at the same time. Therefore, it is possible to quickly switch to four-wheel steering without the trouble of locking both the left and right free wheels 3 simultaneously. Moreover, the interlock mechanism etc. for locking both the left and right free wheels 3 can be eliminated, and the configuration of the lock operation mechanism 52 can be simplified.

  (Effect 2) The lock mechanism 51 always biases the lock claw 54 toward the lock plate 53 by the biasing means 55. The free wheel 3 can turn horizontally without locking while the lock pawl 54 is slidingly rotated along the sliding contact surface 56 of the lock plate 53, but the free wheel 3 can be turned in front When the lock claw 54 enters the claw locking portion 57 of the lock plate 53 and is locked, the lock is locked and horizontal pivoting can not be performed. Therefore, only by setting the lock mechanism 51 in a lockable state, the free wheel 3 has a time lag even if it is not locked on the spot, and the lock is applied by itself.

  Therefore, the lock mechanism 51 eliminates the need to manually adjust the direction of the free wheel 3 and lock it, and the need to check whether the lock has actually been locked, and yet the lock reliability can be obtained. It becomes.

  Conversely, when the lock lever 67 is released from the lock plate 53 against the biasing force of the biasing means 55 by the lock operation mechanism 52, the lock claw 54 is released from the claw locking portion 57, and the free wheel 3 is immediately You will be able to turn horizontally.

  Then, by applying such a lock mechanism 51 to the free wheel 3 of the parts conveyance carriage 1, the lock is naturally obtained when the free wheel 3 faces the front only by making the lockable state. The worker does not have to lock the free wheel 3 by locking the lock claw 54 to the claw locking portion 57 by aligning the direction of the free wheel 3 (both left and right) with the front, and thus the free wheel 3 is locked. Time and effort can be greatly reduced.

  That is, for example, the free wheel 3 naturally turns to the front by causing the dolly main body 2 to go straight by a slight distance, so that at least one of the free wheels 3 is reliably locked without taking time and effort can do. As a result, locking of the free wheel 3 can be further facilitated.

  If the lock is applied to at least one free wheel 3 as described above, four-wheel steering can be performed as described above, so that the component transport cart 1 can be used as it is for four-wheel steering.

  About the other one free wheel 3, even if it does not lock at the same time as the free wheel 3 on the opposite side, if it is in a lockable state, lock it by yourself when facing the front during four-wheel steering become. Therefore, when performing four-wheel steering, even if the two free wheels 3 are not locked in advance simultaneously, the two free wheels 3 will eventually be locked with a time difference.

  (Effect 3) The first steering frame 4 may be provided with the steering switching lever 16 capable of simultaneously operating the lock operation mechanism 52 on the left and right. As a result, even if the lock operation mechanism 52 is independent left and right, the left and right lock operation mechanisms 52 can be simultaneously operated by one steering switching lever 16. Therefore, the lock operation mechanism 52 on either side and the lock mechanism 51 on either side or operation can be simplified.

  Then, only by operating the steering switching lever 16, the left and right free wheels 3 can be locked at the same time or can be unlocked at the same time. A user-friendly four-wheel steering switching mechanism can be constructed.

  (Effect 4) The steering switching lever 16 may be a pulling hook 15 for pulling the cart body 2. As a result, when the tow hook 15 is raised in the vertical direction, the four-wheel steering is restricted in which the free wheel 3 can be turned horizontally so that the tow hook 15 is pulled horizontally. As a result, the four-wheel steering is unregulated, and switching to disable horizontal turning of the free wheel 3 is possible at one time.

  Therefore, it is possible to combine the steering switching lever 16 and the traction hook 15 into one, and switch between non-traction and traction, switching of four-wheel steering, and locking of the free wheel 3 only by the orientation of the traction hook 15. It is efficient because it is possible to perform the switching of the states simultaneously, and since these switching can be performed easily and reliably.

  (Effect 5) The lock operation mechanism 52 may be divided into the first operation lever 71 and the second operation lever 72. Then, the lock lever 54 may be disengaged from the claw locking portion 57 of the lock plate 53 against the biasing force of the biasing unit 55. Further, the second control lever 72 may be configured to transmit the operation of the steering switching lever 16 to the first control lever 71. Thereby, for example, the first control lever 71 and the second control lever 72 can be divided according to the function, divided so as to easily transmit the operating force, or divided so as to be easily arranged, which is actually effective. The left and right independent lock operation mechanism 52 can be obtained.

DESCRIPTION OF SYMBOLS 1 Parts conveyance bogie 2 Bogie main body 3 Free wheel 4 1st steering frame 5 Fixed wheel 6 2nd steering frame 7 Steering link 15 Tow hook 16 Steering switching lever 51 Locking mechanism 52 Lock operation mechanism 53 Locking plate 54 With locking claw 55 Control means 57 Claw locking portion 71 First control lever 72 Second control lever x Direction of movement y Width direction z Vertical direction

Claims (5)

A first steering frame having a pair of left and right free wheels capable of horizontal turning, and a second steering frame having a pair of left and right fixed wheels;
At the lower part of the bogie main body, they are arranged separately in the front and back of the traveling direction, and they are horizontally rotatably supported,
In the parts transport bogie, in which the first steering frame and the second steering frame are coupled by a steering link so as to rotate in the opposite direction to each other and four-wheel steering is possible,
There is provided a lock mechanism capable of individually locking and unlocking horizontal turning of the left and right free wheels.
A part transport carriage characterized in that left and right lock operation mechanisms capable of individually operating the lock mechanisms of the left and right free wheels are provided independently on the first steering frame. It is the parts conveyance truck according to claim 1,
A lock plate fixed to the side of the first steering frame by the lock mechanism;
A lock claw provided on the free wheel so as to be able to move close to and away from the lock plate;
Biasing means for biasing the lock claw toward the lock plate;
The lock plate has a sliding contact surface on which the lock claw can slide and rotate by horizontal turning of the free wheel, and a claw locking portion that the lock claw locks when the free wheel faces the front. Parts transport cart featuring. It is a parts conveyance trolley according to claim 1 or claim 2,
A parts conveyance cart characterized in that the first steering frame has a steering switching lever capable of simultaneously operating the left and right lock operating mechanisms. It is a parts conveyance truck according to claim 3, and
The steering switching lever is a tow hook for towing the bogie main body;
Along with making the tow hook upable,
The tow hook,
While being raised in the vertical direction, it becomes a hand-pushed state and regulates four-wheel steering, and enables unlocking of horizontal turning of the free wheel via the lock operation mechanism and the lock mechanism,
A part characterized in that it becomes switchable so as to lock the horizontal turning of the free wheel via the lock operation mechanism and the lock mechanism while being pulled in a towed state when being turned sideways and being released from the four-wheel steering. Transport truck. It is a parts conveyance truck according to claim 3 or claim 4, wherein
The lock operating mechanism
A first operation lever which disengages the lock claw from the claw engaging portion of the lock plate against the urging force of the urging means;
And a second operation lever for transmitting the operation of the steering switching lever to the first operation lever.