JP2016068913A - Guide device of carriage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a guide device that allows a carriage to easily retreat regardless of enhanced position accuracy in a lateral direction of the carriage and further allows a travelling direction of the carriage to be easily changed when moving the carriage from a preparation position to another position.SOLUTION: The guide device comprises a first guide pin 21 and a second guide pin 22 provided on a lower face of a carriage 1 having front wheels 12 and rear wheels 13. On a guideway 28 is provided a guide rail 42 that extends from a preparation position P1 to a target position P2 and regulates movements in a lateral direction of the first guide pin 21 and the second guide pin 22. The first guide pin 21 and the second guide pin 22 engage with the guide rail 42, with the carriage 1 positioned at the preparation position P1. The second guide pin 22 can move between a guide position where the pin engages with the guide rail 42 and a retreat position where the pin does not engage with the guide rail 42.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a cart guide apparatus having a function of regulating the position of the cart in the left-right direction.

  2. Description of the Related Art Conventionally, for example, a carriage is used as described in Japanese Patent Application Laid-Open No. 2004-133620 when a sheet as a printing material is carried into a sheet-fed printing machine. This carriage has four wheels and travels along a rail on the floor surface. This carriage reciprocates between a preparation position where a large number of sheets are stacked and a target position in the sheet-fed printing press. In the preparation position, the seat is positioned in the front-rear direction and the left-right direction with respect to the carriage. At the target position, the sheet is carried into the sheet feeding device of the sheet-fed printing press.

In this type of carriage, in order to accurately supply the sheet to the sheet-fed printing press, the accuracy of the position of the carriage in the left-right direction is increased both when stopped at the preparation position and when stopped at the target position. It is requested. In order to realize this, it is conceivable that a wheel guide having a structure in which the four wheels are in contact with each other from both sides in the left-right direction is provided on the traveling path, and the movement of the wheels in the left-right direction is restricted by the wheel guide.
By the way, during the operation of the sheet-fed printing press, a plurality of carts with sheets stacked thereon are prepared, and the sheet-loaded carts prepared in advance according to the printing status of the sheet-fed printing press are prepared. After being positioned at the position, it is carried into the sheet feeding device of the sheet-fed printing press that is the target position. At that time, after the sheets are stacked on the carriage at the preparation position, they are kept waiting around the preparation position. However, as the carriage, the traveling direction can be freely changed while the sheets are loaded. Thus, it is necessary to use a rear wheel constituted by a free caster.

Japanese Utility Model Publication No. 7-35704

  However, when a carriage having a rear wheel made of a free caster is used on a traveling path having the above-described wheel guide, there is a problem that it cannot be smoothly returned from the target position to the preparation position. The reason for this is that the rear wheel has a horizontal rotation axis (axle) of the wheel (roller) and a vertical rotation axis (steering axis) of the axle support portion that are displaced in the horizontal direction. This is because the axle support portion of the rear wheel turns around the steering axis so as to be on the rear side (upstream side) of the traveling direction of the carriage. When the carriage is moved to the target position, the rear wheel is in a stable form at the time of forward movement, but when returning from the target position to the preparation position, the rear wheel should be in a stable form that is turned 180 ° from the form at the time of forward movement. This is because a force to turn left and right around the steering axis is received. When the rear wheels are retracted in this way, they are turned in the left-right direction within the range of the clearance between the side walls of the wheel guide, and the left and right wheels respectively hit the side walls of the wheel guide. If the wheel on the left rear wheel and the wheel on the right rear wheel are turned in opposite directions in the left-right direction, the wheel cannot rotate and cannot slide against the wheel guide, and the carriage can move backward. It may disappear.

  The present invention has been made to solve such a problem, and it is easy for the carriage to move backward in spite of the increased accuracy of the position of the carriage in the left-right direction, and the carriage is moved from the preparation position to another position. It is an object of the present invention to provide a guide device capable of easily changing the traveling direction of a carriage when it is moved.

  To achieve this object, a cart guide apparatus according to the present invention has a front wheel made of a fixed caster with a fixed traveling direction and a rear wheel made of a pair of left and right universal casters capable of changing the traveling direction. A first guide pin located on a lower surface of the carriage, located on a front end side of the carriage, a second guide pin located on a rear end side of the carriage, and a travel path on which the carriage travels; A guide rail that linearly extends from a predetermined preparation position to a target position at which the load of the carriage is carried out, and that restricts movement of the first guide pin and the second guide pin in the left-right direction. The guide rail engages with the first guide pin and the second guide pin in a state where the carriage is located at the preparation position, and the second guide pin A guide position for engaging the Doreru, the guide rail is one that is movable between a retracted position not engaged.

  According to the present invention, in the guide device for a carriage, a mark extending in parallel with the guide rail is provided on a road surface of the traveling path, and the mark is arranged in the left-right direction with the first guide pin and the second guide. The pin may be positioned at a position that coincides with the outer edge in the left-right direction of the carriage that is engaged with the guide rail.

In the present invention, the first and second guide pins are engaged with the guide rail, whereby the accuracy of the position of the cart in the left-right direction can be increased.
Since the rear wheel made of a free caster can change the position of the axle freely, it reverses in the front-rear direction in the stroke in which the carriage moves backward from the target position to the preparation position, and has the same form as when moving forward. For this reason, the carriage travels smoothly both when moving forward and when moving backward.

By positioning the second guide pin at the retracted position while the carriage is stopped at the preparation position, the carriage can be turned around the first guide pin. For this reason, when the carriage is moved from the preparation position to another position different from the target position, the traveling direction of the carriage can be freely changed from the preparation position to another position.
Therefore, according to the present invention, the carriage can be easily moved backward in spite of an increase in the accuracy of the position of the carriage in the left-right direction, and the traveling direction of the carriage can be changed when the carriage is moved from the preparation position to another position. A cart guide device that can be easily changed can be provided.

FIG. 3 is a side view of a guide device for a carriage and a spare sheet stacking unit of a sheet-fed printing press according to the present invention. It is a rear view of a guide device of a cart and a spare sheet stacking unit. It is a top view of the guide apparatus of a trolley | bogie. It is a bottom view of a trolley. It is a rear view which expands and shows the guidance apparatus of a trolley | bogie. FIGS. 6A and 6B are cross-sectional views for explaining the second guide pin. FIG. 6A shows a state where the second guide pin is located at the guide position, and FIG. 6B shows a state where the second guide pin is located at the retracted position. It is a top view of the principal part which shows the state which the trolley | bogie is moving forward toward a guide rail. It is a top view of the principal part which shows the state which the 1st guide pin engaged with the guide rail. It is a top view of the principal part which shows the state which changed the traveling direction in the state in which only the 1st guide pin has engaged with the guide rail.

  Hereinafter, an embodiment of a cart guiding apparatus according to the present invention will be described in detail with reference to FIGS. In this embodiment, an example will be described in which the cart guide device according to the present invention is applied to a sheet feeding device of a sheet-fed printing press.

  A cart 1 shown in FIG. 1 is for carrying a large number of sheets 4 as printed materials into a sheet supply unit 3 of a sheet-fed printing machine 2 as a processing machine. The sheets 4 are stacked on the carriage 1 via the stacking plate 6 in the spare sheet stacking unit 5 of the sheet-fed printing machine 2. In the following, the direction in which the carriage 1 travels toward the sheet supply unit 3 is referred to as the front, and the direction opposite to this direction, that is, the direction in which the carriage 1 is separated from the sheet supply unit 3 is referred to as the rear. Moreover, the left-right direction described below is the left-right direction in the state which looked at the trolley | bogie 1 which is moving forward from back.

  The cart 1 includes a loading platform 11 on which the loading plate 6 is placed, a front wheel 12 and a rear wheel 13 that support the loading platform 11, and a handle 14 that extends upward from the rear end of the loading platform 11. The front wheel 12 and the rear wheel 13 of the carriage 1 are provided at both ends of the carriage 1 in the left-right direction. The front wheel 12 is constituted by a so-called fixed caster. The fixed caster is a caster in which the axle 15 (see FIG. 4) does not move with respect to the loading platform 11. The front wheel 12 includes an axle support 12a fixed to the loading platform 11, and a wheel 12b rotatably supported by the axle support 12a.

  The rear wheel 13 is constituted by a so-called free caster. The universal caster is a caster in which the axle 17 rotates with respect to the loading platform 11 around a steering shaft 16 extending in the vertical direction. The rear wheel 13 includes an axle support portion 13a that is rotatably supported on the loading platform 11 about the steering shaft 16, and a wheel 13b that is rotatably supported on the axle support portion 13a. The axle 17 of this free caster is positioned behind the steering shaft 16 in the traveling direction.

  As shown in FIG. 2, a first guide pin 21 and a second guide pin 22 projecting downward are provided on the lower surface of the center portion in the left-right direction of the loading platform 11. The first guide pin 21 is located on the front end side of the carriage 1, and the second guide pin 22 is located on the rear end side of the carriage 1. These first and second guide pins 21 and 22 are arranged in the front-rear direction at the center in the left-right direction of the carriage 1. The first guide pin 21 is fixed to the loading platform 11 and cannot move with respect to the carriage 1.

  As shown in FIGS. 6A and 6B, the second guide pin 22 is supported on the cargo bed 11 via a support shaft 23 so as to be swingable in the front-rear direction. As shown in FIG. 6A, the second guide pin 22 according to this embodiment swings in the guide position extending in the vertical direction and in the direction in which the lower end is displaced forward as shown in FIG. 6B. It is possible to move between the moved retracted positions.

  A slide pin 24 for restricting the swing of the second guide pin 22 is provided in the vicinity of the support shaft 23 in the loading platform 11. The slide pin 24 is connected to an operation mechanism (not shown), and moves between two positions when the operation mechanism is operated by an operator. These two positions are a use position located at the same position as the second guide pin 22 in the left-right direction and a retracted position different from the second guide pin 22 in the left-right direction.

  As shown in FIG. 6A, the slide pin 24 is positioned at the use position while the second guide pin 22 is positioned at the guide position, so that the slide pin 24 is placed at the upper end of the second guide pin 22. It fits into the drilled pin hole 25. In a state where the slide pin 24 is fitted in the pin hole 25, the second guide pin 22 is held at the guide position. Further, as shown in FIG. 6B, the slide pin 24 moves to the use position while the second guide pin 22 is located at the retracted position, so that the upper portion of the second guide pin 22 is reached. Touch the outer surface. In this state, the second guide pin 22 is held at the retracted position.

  As shown in FIG. 2, the loading plate 6 is formed in a rectangular shape in which both ends in the left-right direction protrude laterally from the cart 1, and is detachably mounted on the loading platform 11. Both ends in the left-right direction of the loading platform 11 cannot be seen by being hidden by the loading plate 6 when the loading plate 6 is placed. For this reason, the left and right ends of the carriage 1 as viewed from the operator pushing the carriage 1 are substantially both ends of the loading plate 6 in the left and right direction.

  As shown in FIG. 5, a pin hole 26 is formed at the center of the stacking plate 6 according to this embodiment. A pin 27 provided on the loading platform 11 of the carriage 1 is fitted in the pin hole 26. For this reason, the stacking plate 6 is placed on the carriage 1 in a state where movement in the front-rear direction and the left-right direction is restricted by the fitting of the pins 27 and the pin holes 26. The position of the stacking plate 6 around the pin 27 in the rotational direction is determined by the spare sheet stacking unit 5 described later.

The spare sheet stacking unit 5 is for positioning the rotational direction of the stacking plate 6 on the carriage 1 and positioning the sheets 4 stacked on the stacking plate 6 in the front-rear direction and the left-right direction. It is provided on the traveling path 28 of the carriage 1 that proceeds toward the section 3.
The spare sheet stacking unit 5 according to this embodiment includes a plurality of support columns 31 that are respectively set on the left side and the right side of the traveling path 28 described above, and a front contact member 32 and a lateral support member 33 provided on these support columns 31. Etc.

  The front abutting member 32 is a plate-like member extending in the up-down direction that aligns the position of the seat 4 in the front-rear direction, the use position where the front end of the seat 4 on the carriage 1 and the front end edge of the stacking plate 6 abut, and the travel path It is possible to move between the retreat positions for retreating sideways 28. The lateral support member 33 is for aligning the position of the seat 4 in the left-right direction, and is movable between a use position extending in the vertical direction on both sides of the seat 4 and a retracted position for retracting to the side of the seat 4. It is. A large number of sheets 4 placed on the loading plate 6 on the carriage 1 are positioned in the front-rear direction when the front end abuts against the front abutting member 32, and the left-right direction when both ends in the left-right direction abut against the lateral abutting member 33. Is positioned.

  The stacking plate 6 is brought into contact with the front contact member 32 before the sheet 4 is placed thereon. Thus, the position of the stacking plate 6 is determined in a state in which the front end edge of the stacking plate 6 extends in the left-right direction. In other words, the position of the stacking plate 6 that rotates about the pin 27 is positioned so as to abut on the front abutting member 32 and the side edge extends in parallel with a mark 51 to be described later. Hereinafter, the position of the carriage 1 when the stacking plate 6 and the sheet 4 are positioned by the preliminary sheet stacking unit 5 is referred to as a preparation position P1 (see FIGS. 1 and 3).

  The sheet supply unit 3 has a hoistway 34 (see FIG. 1) through which the carriage 1 can travel and enter. Although not shown in the drawings, the hoistway 34 is provided with an elevating device for raising the seat 4. The carriage 1 is stopped at the bottom of the hoistway 34 with a large number of seats 4 placed thereon. The seat 4 rises in the hoistway 34 together with the stacking plate 6 by the lifting device pulling up the stacking plate 6 in the hoistway 34. Hereinafter, the position of the carriage 1 when the seat 4 is pulled up by the lifting device (when the load on the carriage 1 is carried out) is referred to as a target position P2.

In order for the stacking plate 6 to be correctly connected to the lifting device, the carriage 1 needs to be positioned with high accuracy in the front-rear direction and the left-right direction at the target position P2. The front-rear and left-right positions of the carriage 1 are determined by the guide device 41 according to the present invention.
As shown in FIGS. 1 to 3, the guide device 41 according to this embodiment includes a guide rail 42 provided on the traveling path 28, first and second guide pins 21 and 22 provided on the carriage 1, and the like. It is constituted by.

The guide rail 42 is for restricting the movement of the carriage 1 in the left-right direction, and extends linearly from the preparation position P1 to the target position P2, as shown in FIG. The guide rail 42 is provided at the center in the left-right direction of the travel path 28.
As shown in FIGS. 2 and 3, the guide rail 42 according to this embodiment includes a pair of guide members 42 a and 42 b provided on the road surface of the traveling path 28. These guide members 42a and 42b are made of a belt-like plate having a predetermined thickness, and are fixed so as not to move to the road surface. These guide members 42a and 42b are arranged in parallel in a state where the first and second guide pins 21 and 22 are separated from each other with an interval at which they can be engaged.

  The heights of the upper surfaces of these guide members 42a and 42b are above the lower end of the first guide pin 21 and the lower end of the second guide pin 22 located at the guide position {see FIG. 6 (A)}. As shown in FIG. 6 (B), it is located below the lowermost portion 43 of the carriage 1. In addition, the lower end of the 2nd guide pin 22 located in a retracted position is located above the upper surface of guide member 42a, 42b.

  In a state where the carriage 1 is stopped at the center in the left-right direction at the preparation position P1 of the travel path 28, the first guide pin 21 and the second guide pin 22 located at the guide position are a pair of the guide rails 42. The guide members 42a and 42b are engaged with each other. In other words, the second guide pin 22 is movable between a guide position that engages with the guide rail 42 and a retracted position that does not engage with the guide rail 42. When the first and second guide pins 21 and 22 are engaged with the guide rail 42, the movement of the first and second guide pins 21 and 22 in the left-right direction is restricted.

At the rear ends of the pair of guide members 42a and 42b (ends close to the preparation position P1), the guide members are directed toward the rear ends so that the first guide pins 21 can easily enter the guide rails 42. An inclined surface 44 (see FIG. 4) is formed in which the interval between 42a and 42b gradually increases.
As shown in FIG. 3, the rear end portion of the guide rail 42 extends rearward from the rear end of the carriage 1 that is stopped at the preparation position P1. That is, the guide rail 42 engages the first and second guide pins 21 and 22 in a state where the carriage 1 is located at the preparation position P1.

The position of the guide rail 42 in the left-right direction is such that the carriage 1 enters the seat supply unit 3 with the first and second guide pins 21, 22 engaged with the guide rail 42. This is the position where the stacking plate 6 is positioned with respect to the lifting device.
A stopper 45 that comes into contact with the first guide pin 21 is provided at the front end of the guide rail 42, that is, the end located in the sheet supply unit 3. The front-rear direction position of the stopper 45 is a position where the stacking plate 6 is positioned with respect to the lifting device in the front-rear direction with the first guide pin 21 in contact with the stopper 45. Therefore, the carriage 1 moves forward until the first guide pin 21 comes into contact with the stopper 45, whereby the stacking plate 6 is positioned in the front-rear direction and the left-right direction with respect to the lifting device. That is, the carriage 1 is positioned at the target position P2 by the guide device 41.

  As shown in FIG. 3, as shown in FIG. 3, it is parallel to the guide rail 42 at a portion (a road surface at the preparation position P <b> 1) that is a predetermined distance away from the guide rail 42 on the rear side of the spare sheet stacking unit 5. A mark 51 is provided extending in the direction. This mark 51 is a position that coincides with the left outer edge (the left end of the stacking plate 6) of the carriage 1 in a state where the first and second guide pins 21 and 22 are engaged with the guide rail 42 in the left-right direction. Is positioned.

Next, operation | movement of the guide apparatus 41 of the trolley | bogie 1 comprised as mentioned above is demonstrated with FIGS.
When the sheets 4 are stacked on the carriage 1 or when the carriage 1 on which the sheets 4 are already stacked is advanced to the sheet supply unit 3, first, the second guide pin 22 is positioned at the guide position. Then, as shown in FIG. 7, the carriage 1 is advanced toward the guide rail 42. At this time, the carriage 1 is moved forward while maintaining a state where the mark 51 and the left end of the stacking plate 6 overlap each other when viewed from above.

  By moving the carriage 1 forward as described above, the first guide pin 21 is engaged with the guide rail 42 as shown in FIG. Then, when the carriage 1 is moved straight in a state where the first guide pin 21 is engaged with the guide rail 42, the second guide pin 22 is engaged with the guide rail 42. When the first guide pin 21 and the second guide pin 22 are engaged with the guide rail 42, the carriage 1 is positioned in the left-right direction.

When the sheet 4 is newly placed on the carriage 1, the front contact member 32 of the spare sheet stacking unit 5 is moved to a position where the traveling path 28 is blocked. On the other hand, when the carriage 1 on which the sheets 4 are stacked is advanced to the sheet supply unit 3, the front contact member 32 is retracted to the side of the traveling path 28.
When the front contact member 32 is present at a position where the traveling path 28 is blocked, the carriage 1 stops in a state where the front end of the stacking plate 6 contacts the front contact member 32. Thus, when the stacking plate 6 contacts the front contact member 32, the carriage 1 is stopped at the preparation position P1 while being positioned in the front-rear direction and the left-right direction.

After a large number of sheets 4 are stacked on the stacking plate 6, when the sheets 4 are carried into the sheet supply unit 3, the carriage 1 is moved forward by moving the front contact member 32 to the side.
When the carriage 1 moves forward from the preparation position P1, since the first and second guide pins 21 and 22 are engaged with the guide rail 42 and the traveling direction of the carriage 1 is restricted, the carriage 1 is moved forward. The carriage 1 enters the sheet supply unit 3 simply by pushing the button. The carriage 1 that has entered the sheet supply unit 3 stops at the target position P <b> 2 while being positioned in the front-rear direction and the left-right direction by the first guide pin 21 coming into contact with the stopper 45 of the guide rail 42.

  When the carriage 1 moves backward from the target position P2 toward the preparation position P1, the rear wheel 13 can freely change the position of the axle, so that the carriage 1 moves back and forth in the process of moving the carriage 1 back from the target position P2 to the preparation position P1. It reverses in the direction and becomes the same form as when moving forward. For this reason, the backward movement of the carriage 1 is not hindered, and the carriage 1 smoothly moves backward to the preparation position P1.

  On the other hand, when the carriage 1 loaded with the sheets 4 at the preparation position P1 is moved to a position different from the target position P2, or when the carriage 1 retracted from the destination position P2 to the preparation position P1 is moved to another position. Then, the carriage 1 is moved backward by positioning the second guide pin 22 at the retracted position. Thus, in the state in which the engagement between the second guide pin 22 and the guide rail 42 is released, the traveling direction of the carriage 1 is changed by turning the rear wheel 13 made of a free caster as shown in FIG. It can be changed freely.

  Therefore, according to this embodiment, it is easy to move the carriage 1 despite the increased accuracy of the position of the carriage 1 in the left-right direction, and when the carriage 1 is moved from the preparation position P1 to another position. In addition, it is possible to provide a cart guide device that can easily change the traveling direction of the cart 1.

A mark 51 extending in parallel with the guide rail 42 is provided on the road surface of the traveling road 28 according to this embodiment. This mark 51 is a cart 1 in the state where the first and second guide pins 21 and 22 are engaged with the guide rail 42 in the left-right direction or a load (positioned on the cart 1). It is positioned at a position that coincides with the left and right outer edges (the left outer edge in this embodiment) of the stacking plate 6).
Therefore, when the carriage 1 is advanced to the preparation position P1, the first and second guide pins of the carriage 1 are moved to the guide rail 42 by advancing while keeping the outer edge of the carriage 1 overlapping the mark 51 as viewed from above. 21 and 22 engage. Therefore, according to this embodiment, even if the rear end of the guide rail 42 is hidden by the carriage 1 or the seat 4 on the carriage 1, the first guide pin 21 can be reliably engaged with the guide rail 42. The operation of positioning the carriage 1 at the preparation position P1 can be easily performed.

  The embodiment described above has shown an example in which the present invention is applied to the sheet-fed printing press 2. However, the present invention can be applied to other apparatuses without being limited to such a limitation. Examples of other apparatuses include a die cutting apparatus that punches a sheet into a predetermined shape, and a bending apparatus that performs bending on the sheet.

  DESCRIPTION OF SYMBOLS 1 ... Carriage, 6 ... Loading board, 12 ... Front wheel, 13 ... Rear wheel, 21 ... 1st guide pin, 22 ... 2nd guide pin, 28 ... Traveling path, 41 ... Guide apparatus, 42 ... Guide rail, 51 ... mark, P1 ... preparation position, P2 ... target position,

Claims (2)

A first wheel is provided on the lower surface of a carriage having a front wheel made of a fixed caster having a fixed running direction and having a rear wheel made of a pair of left and right universal casters capable of changing the running direction, and located on the front end side of the carriage. A second guide pin located on the rear end side of the guide pin and the carriage;
The first guide pin and the second guide are provided on a travel path on which the carriage travels and extend linearly from a predetermined preparation position on the travel path to a target position on which the load on the carriage is unloaded. With a guide rail that regulates the movement of the pin in the left-right direction,
The guide rail engages the first guide pin and the second guide pin in a state where the carriage is located at the preparation position.
The cart guide apparatus characterized in that the second guide pin is movable between a guide position engaged with the guide rail and a retracted position not engaged with the guide rail. The cart guide apparatus according to claim 1, wherein
On the road surface of the travel path, a mark extending in parallel with the guide rail is provided,
In the left-right direction, the mark is a position of the carriage or the loaded article positioned and placed on the carriage where the first guide pin and the second guide pin are engaged with the guide rail. A cart guide apparatus characterized by being positioned at a position coinciding with an outer edge in the left-right direction.

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