JP6393641B2 - Production line - Google Patents

Description

  The present invention relates to a production line for assembling various components to components mounted on a conveyance table that moves along a predetermined path.

  In this type of production line, a stopper (for example, a clipping stopper described in Patent Document 1) that restricts the movement of the conveyed object is provided in a predetermined path so that the conveyed object moves at a predetermined distance. May be provided.

JP 2000-53227 A

  However, in the production line as described above, when stopping the object to be conveyed that moves along the predetermined path with the stopper provided in the predetermined path, if the object to be conveyed is moved again, a relatively large force is required. Is required, and production efficiency may be reduced.

  An object of the present invention is to provide a production line that suppresses a decrease in production efficiency in consideration of the actual situation in the prior art.

In order to achieve the above object, the production line of the present invention is a production line in which various parts are assembled to components mounted on a conveyance table that moves along a predetermined path.
A first support unit (for example, a transfer table collection unit 10 to be described later) that movably supports the plurality of transfer tables;
A second support portion (for example, a first linear unit 30 described later) that movably supports the transport table;
A receiving position that is disposed between the first support part and the second support part and that receives the transfer table from the first support part, and a position that passes the received transfer table to the second support part A delivery section (for example, a rotation unit 20 to be described later) movable between the delivery position and
The delivery unit that is provided in the first support unit and has received the transport table from the first support unit moves to the transfer position, passes the transport table to the second support unit, and returns to the reception position. A movement restricting unit (for example, a transfer table holding unit 120 described later) that restricts movement of the subsequent transfer table from a predetermined position,
The first support part is inclined so that the carrier can move to the delivery part side by its own weight,
The movement restriction unit is
A projecting position that protrudes along a direction intersecting the transport direction, sandwiches both ends of the transport table in the transport direction at the predetermined position, and restricts the transport table from moving from the predetermined position; and It is possible to move to a retreat position that does not restrict movement,
When the transport table moves from the first support unit to the delivery unit, a movement auxiliary unit that contacts the transport table at the retracted position and assists the movement of the transport table (for example, a roller unit 125 described later) It is a production line characterized by having

  According to the present invention, it is possible to suppress a decrease in production efficiency.

It is a top view which shows the outline | summary of the manufacturing line of one Embodiment of this invention. It is a perspective view of the conveyance stand of one embodiment of the present invention. It is a perspective view of the linear unit of one Embodiment of this invention. It is a perspective view which shows the conveyance stand collection | recovery unit and rotation unit of one Embodiment of this invention. It is a perspective view which shows the cylinder part of the conveyance stand holding | maintenance part of one Embodiment of this invention. It is a figure which shows the state in which the conveyance stand holding | maintenance part of one Embodiment of this invention is holding the conveyance stand. It is a figure explaining operation | movement of the conveyance stand holding part of one Embodiment of this invention, A shows the state in which a holding stand holding part exists in a protrusion position, B shows the state in which a holding stand holding part exists in a retracted position Yes. It is a perspective view of the rotation unit of one Embodiment of this invention, and is a figure which shows the state which the raising / lowering conveyance stand receiving part fell. It is a perspective view of the rotation unit of one Embodiment of this invention, and is a figure which shows the state which the raising / lowering conveyance stand receiving part raised. It is a figure explaining operation | movement of the rotation unit of one Embodiment of this invention, A shows the state in which a rotation unit exists in a receiving position, B shows the state in which a rotation unit exists in a delivery position, C shows B The state in which the conveyance stand support portion has been raised from the state shown in FIG. It is a figure explaining operation | movement of the fall prevention part of one Embodiment of this invention, A shows the state before a conveyance stand moves to a rotation unit, B is when a conveyance stand moves to a rotation unit C shows the state after the carrier has moved to the rotating unit. It is a perspective view of the switching unit of one embodiment of the present invention. It is a top view which shows the outline | summary of the manufacturing line using the switching unit of one embodiment of this invention.

  A production line 1 as an embodiment of the present invention will be described with reference to FIGS.

<Outline of production line>
First, the outline of the production line 1 will be described with reference to FIG. FIG. 1 is a top view showing an outline of the production line 1 of the present embodiment.

  A manufacturing line 1 shown in FIG. 1 is used when manufacturing a front door that can be opened and closed with respect to a cabinet that accommodates a pachislot reel, a circuit board, and the like.

  The production line 1 includes a carrier recovery unit 10, a rotation unit 20, a first linear unit 30, a first U-shaped unit 40, a second linear unit 50, a second U-shaped unit 60, and a third linear shape. A unit 70 and a third U-shaped unit 80 are provided. In the following description, the first linear unit 30, the second linear unit 50, and the third linear unit 70 may be collectively referred to as linear units 30, 50, and 70. In addition, the first U-shaped unit 40, the second U-shaped unit 60, and the third U-shaped unit 80 may be collectively referred to as U-shaped units 40, 60, and 80.

  Each unit 10, 20, 30, 40, 50, 60, 70, 80 includes an iron pipe covered with resin, a so-called erector pipe 2 (see FIG. 3), and a joint 3 ( (See FIG. 3).

  One end of the first linear unit 30 is detachably connected to one end of the first U-shaped unit 40 by an unshown inter-unit joint. Similarly, the other end of the first U-shaped unit 40 and one end of the second linear unit 50 are detachably connected, and the other end of the second linear unit 50 and the second U-shaped unit 60 are connected. The one end part of this is connected so that attachment or detachment is possible. Further, the other end of the second U-shaped unit 60 and one end of the third linear unit 70 are detachably connected, and the other end of the third linear unit 70 and the third U-shaped unit 80 are connected. One end portion is detachably connected. And the other end part of the 3rd U-shaped unit 80 and the one end part of the conveyance stand collection | recovery unit 10 are connected so that attachment or detachment is possible.

  The production line 1 has a plurality of transfer platforms 90 on which the front door component 4 is placed. Each unit 10, 20, 30, 40, 50, 60, 70, 80 has a roller for sliding the transport table 90, and supports the transport table 90 so as to be slidable.

  In FIG. 1, work positions of workers who perform various works on the production line 1 are indicated by W1 to W12. At each work position, one work is performed by one worker. That is, in the production line 1 shown in FIG. 1, the front door is manufactured through 12 operations (processes) by 12 workers.

  For example, at the work position W <b> 1, the work of placing the front door component 4 (see FIG. 2) on the transport table 90 is performed. In each of the work positions W2 to W11, an operation of attaching various components (not shown) to the constituent member 4 placed on the transport table 90 is performed. Further, at the above-described work position W12, a work is performed in which the front door component 4 to which various components are attached is lifted from the transfer table 90 and transferred to a storage shelf (not shown).

  The carrier table 90 allows the operator to slide the carrier table 90 along a predetermined path, so that the work positions W1, W2, W3, W4, W5, W6, W7, W8, W9, W10, Slide around W11 and W12 in this order. Further, after the work performed at the work position W <b> 12, the worker moves the transport base 90 to one end of the transport base collection unit 10. The carriage 90 moved to one end of the carriage collection unit 10 slides and moves by its own weight from one end to the other end of the carriage collection unit 10 as will be described later.

  Moreover, the conveyance stand 90 which moved to the other end part of the conveyance stand collection | recovery unit 10 moves to the rotation unit 20 with dead weight so that it may mention later. Here, the rotation unit 20 has a receiving position that is a position for receiving the conveyance table from the conveyance table collection unit 10 around the support shaft 21, and the other end portion of the first linear unit 30 (first U-shaped unit). 40 and the end portion on the side opposite to the end portion connected to 40, and can be rotated between a transfer position, which is a position where the transport table 90 is transferred to the first linear unit 30. For this reason, the operator rotates the rotation unit 20 that supports the conveyance table 90 from the receiving position to the transfer position, conveys the conveyance table 90 along a curved path, and moves it to the first linear unit 30. be able to. That is, the transport table 90 can be moved to the vicinity of the work position W1. In FIG. 1, the rotation unit 20 at the receiving position is indicated by a solid line, and the rotation unit 20 at the transfer position is indicated by a two-dot chain line.

  As described above, the transport table 90 moves on the production line 1 along a predetermined route. After moving the transport table 90 from the rotation unit 20 to the first linear unit 30, the operator rotates the rotation unit 20 from the transfer position to the reception position and rotates the subsequent transport table 90. The moving unit 20 can be moved.

  The production line 1 also includes a switching unit 400 (see FIG. 12) that is used by switching to the first U-shaped unit 40 or the second U-shaped unit 60. Details of the switching unit 400 will be described later with reference to FIGS. 12 and 13.

<Transportation platform>
Next, with reference to FIG. 2, the conveyance stand 90 in this embodiment is demonstrated.
FIG. 2 is a perspective view of the transport table 90 in the present embodiment. 2 shows the transfer table 90 in a state where the transfer table 90 is supported by each of the units 10, 20, 30, 40, 50, 60, 70, and 80 so as to be movable.

  As shown in FIG. 2, the transport base 90 includes a transport base body 91 that is a substantially rectangular flat plate-shaped member, and an upper protrusion 92 and a lower protrusion 93 that are provided on the transport base 91. ing.

  The upper protrusion 92 is provided on one end side (upward in FIG. 2) in the longitudinal direction of the transport base body 91 so as to protrude from one surface (surface in FIG. 2) of the transport base body 91. Further, the lower protrusion 93 is provided on the other end side in the longitudinal direction of the transport base body 91 (downward in FIG. 2) so as to protrude from one surface side of the transport base body 91.

  In the transport table 90 supported by the units 10, 20, 30, 40, 50, 60, 70, 80 described above, a lower protrusion 93 positioned below and an upper protrusion 92 positioned above Are opposed in the vertical direction.

  When the constituent member 4 of the front door is placed on the transport table 90, the lower protrusion 93 supports the lower part of the constituent member 4. Moreover, the upper protrusion 92 supports the upper part of the back surface of the structural member 4 so that the structural member 4 becomes an angle suitable for work.

  A pair of notches formed by notching the side portion of the carrier table main body 91 on the other end side in the longitudinal direction of the carrier table main body 91 and above the portion where the lower protrusion 93 is provided. Portions 94 and 94 are formed.

  The other surface (the back surface in FIG. 2) and the lower end of the conveyance table 90 come into contact with various rollers, which will be described later, of each unit 10, 20, 30, 40, 50, 60, 70, 80. The units 10, 20, 30, 40, 50, 60, 70, 80 are supported so as to be slidable.

<Linear unit>
Next, the linear units 30, 50, and 70 (see FIG. 1) will be described with reference to FIG. FIG. 3 is a perspective view of the linear unit in the present embodiment.

  Since the linear units 30, 40, 50 are configured substantially the same, in the following description, the first linear unit 30 will be described, and the second linear unit 50 and the third linear unit 70 will not be described. Omitted.

  As shown in FIG. 3, the first linear unit 30 is formed in a substantially rectangular parallelepiped frame shape by a plurality of ejector pipes 2 and joints 3 connecting the ejector pipes 2.

  In addition, the first linear unit 30 includes a substantially rectangular frame-shaped transport base receiving portion 301, three short leg portions 302 that support the transport base receiving portion 301, and three long leg portions 303. ing.

  The transport base receiving part 301 includes a pair of base support long side parts 304 and 304 extending along the longitudinal direction of the transport base receiving part 301 and a length shorter than the base support long side part 304. It has a pair of pedestal receiving short sides 305 and 305 extending along the short direction. Moreover, the conveyance base receiving part 301 is a substantially central part in the longitudinal direction of the conveyance base receiving part 301 and extends in parallel with the short side part 305 of the base. A central support 306 coupled to 304;

  The short legs 302 are shorter than the long legs 303 and are located outside the production line 1. Further, the three short legs 302 are arranged at a predetermined distance in the extending direction of the pedestal long side 304, and support the both ends and the substantially central part of one pedestal long side 304, respectively. doing. Similarly, the three long leg portions 303 are also arranged at a predetermined distance in the extending direction of the pedestal long side portion 304, and both end portions and substantially central portions of the other pedestal long side portion 304 are arranged. Support.

  The three short leg portions 302 and the three long leg portions 303 are coplanar and face each other in a direction orthogonal to the extending direction of the pedestal long side portion 304. Since the transport leg receiving part 301 is supported by the short leg part 302 and the long leg part 303 as described above, as shown in FIG. In FIG. 3, the pedestal long side 304 located below is inclined so as to be disposed at a lower position than the other pedestal long side 304 (the upper pedestal long side 304 shown in FIG. 3). ing. In the production line 1, the first linear unit 30 is arranged so that one base long side 304 located below is closer to the operator than the other base long side 304 located above. The

  Between the adjacent short leg portions 302 and 302 and between the opposed short leg portion 302 and the long leg portion 303, a reinforcing portion 307, which is the ejector pipe 2 for reinforcement, is provided. Similarly, a reinforcing portion 307 is provided between the adjacent long leg portions 303 and 303.

  In addition, the transport table receiving unit 301 includes a first roller unit 308 and a roller support unit 309 that supports the first roller unit 308. The first roller unit 308 is a horizontally long member, and is arranged so that its longitudinal direction is parallel to the extending direction of the table receiving long side portion 304 of the transport table receiving unit 301. Further, the length of the first roller portion 308 in the longitudinal direction is set to be substantially equal to the length of the table receiving long side 304 of the transport table receiving unit 301. The first roller portion 308 is provided with a plurality of rollers that are pivotally supported by a shaft (not shown) extending in the lateral direction so as to be rotatable. When the transport table 90 (see FIG. 2) is placed on the transport table receiver 301, the circumferential surface of the roller of the first roller unit 308 comes into contact with the lower end of the transport table main body 91.

  The roller support portion 309 is provided in a base receiving long side portion 304 positioned below the transport base receiving portion 301, and a longitudinal direction of the first roller portion 308 and an extending direction of the base receiving long side portion 304 are defined. The first roller unit 308 is supported so as to be parallel. The roller support portion 309 includes a pair of projecting portions 310 and 310 that project obliquely upward from both ends in the extending direction of the pedestal long side portion 304, and a fall prevention portion 311.

Both ends of the first roller portion 308 in the longitudinal direction are placed on the pair of projecting portions 310 and 310.
The fall prevention part 311 extends in parallel with the pedestal long side part 304 above the projecting part 310, and both ends in the extending direction are bent downward to be connected to one end part in the projecting direction of the projecting part 310. It is a substantially U-shaped member. The fall prevention unit 311 contacts the lower part of the conveyance table 90 when the conveyance table 90 slides from the conveyance table receiving unit 301 when the conveyance table 90 (see FIG. 2) is placed on the conveyance table reception unit 301. To prevent.

  Further, the transport table receiving unit 301 includes a second roller unit 312 and a third roller unit 313. The second roller unit 312 includes a pair of right second roller unit 314 and left second roller unit 315. The right second roller portion 314 is a horizontally long member, and is arranged so that the longitudinal direction thereof is parallel to the extending direction of the pedestal long side portion 304. Both ends in the longitudinal direction of the right second roller portion 314 are supported by one of the carrier table receiving portions 301 (the right side in FIG. 3) by a table receiving short side portion 305 and a central support portion 306. The right second roller portion 314 is provided with a plurality of rollers that are pivotally supported by a shaft (not shown) extending in the short direction so as to be rotatable.

  Further, the left second roller portion 315 is a horizontally long member, and is arranged so that the longitudinal direction thereof is parallel to the extending direction of the support receiving long side portion 304. Both ends in the longitudinal direction of the left second roller part 315 are supported by the other side (left side in FIG. 3) of the carrier receiving part 301 by a base short side part 305 and a central support part 306, and the left second roller The part 315 is disposed slightly above the right second roller part 314. The left second roller portion 315 is provided with a plurality of rollers that are pivotally supported by a shaft (not shown) extending in the short direction so as to be rotatable.

  When the transport table 90 (see FIG. 2) is placed on the transport table receiving unit 301, the circumferential surface of the roller of the second roller unit 312 comes into contact with the lower part of the other surface (the back surface in FIG. 2) of the transport table main body 91. .

  The third roller unit 313 is disposed above the second roller unit 312 and includes a pair of right third roller unit 316 and left third roller unit 317. The right third roller portion 316 is a horizontally long member, and is arranged so that the longitudinal direction thereof is parallel to the extending direction of the pedestal long side portion 304. Both ends of the right third roller portion 316 in the longitudinal direction are supported by one of the carrier receiving short side portions 305 and the central support portion 306 of the conveying table receiving portion 301. The right third roller section 316 is provided with a plurality of rollers that are pivotally supported by a shaft (not shown) extending in the short direction so as to be rotatable.

  The left third roller portion 317 is a horizontally long member, and is arranged so that the longitudinal direction thereof is parallel to the extending direction of the pedestal long side portion 304. Both ends in the longitudinal direction of the left third roller portion 317 are supported by the other base receiving short side portion 305 and the center support portion 306 of the transport base receiving portion 301, and the left third roller portion 317 is It is disposed slightly above the three roller section 316. The left third roller section 317 is provided with a plurality of rollers that are pivotally supported by a shaft (not shown) extending in the short direction so as to be rotatable.

  When the transport table 90 (see FIG. 2) is placed on the transport table receiving unit 301, the peripheral surface of the roller of the third roller unit 313 contacts the upper portion of the other surface (the back surface in FIG. 2) of the transport table main body 91. .

  As described above, the roller of the first roller unit 308 is in contact with the lower end portion of the transport table main body 91, and the roller of the second roller unit 312 is the lower part of the other surface (the back surface in FIG. 2) of the transport table main body 91. Then, the roller of the third roller portion 313 comes into contact with the upper portion of the other surface of the transport table main body 91. Therefore, the operator can easily slide the transfer table 90, move it from the rotation unit 20, and place it on the transfer table receiving unit 301. Can be moved to the unit 40. That is, the transfer table 90 can be easily transferred between the units.

<U-shaped unit>
Next, the U-shaped units 40, 60, 80 will be described. As shown in FIG. 1, the U-shaped units 40, 60, 80 are configured such that the other U-shaped side of the third U-shaped unit 80 (the side connected to the transport table recovery unit 10) Except for the point that is longer than 60, the configuration is substantially the same. For this reason, in the following description, the 1st U-shaped unit 40 is demonstrated and the description about the 2nd U-shaped unit 60 and the 3rd U-shaped unit 80 is abbreviate | omitted.

  As shown in FIG. 1, the first U-shaped unit 40 is formed in a substantially U-shape. The first U-shaped unit 40 is configured by combining three first linear units 30 described with reference to FIG. That is, another first linear unit 30 is arranged on one end side of two first linear units 30 arranged in parallel at a predetermined distance and connected to each other. At this time, the three first linear units 30 are arranged so that the side on which the roller support portion 309 of each first linear unit 30 is provided faces the outside of the production line 1, that is, is arranged on the worker side. Are concatenated.

  Both corners of the first U-shaped unit 40 (portions connecting the first linear units 30), one end (end connecting to the first linear units 30) and the other end (second linear) A transport direction changing unit (not shown) for changing the transport direction of the transport base 90 (see FIG. 2) by 90 degrees is provided at the end connected to the unit 50. The transport direction changing unit includes, for example, a unit that rotates the transport base 90 by 90 degrees about a rotation axis that passes through the center of the short direction of the transport base 90, and a transport path that is curved so that the transport direction changes by 90 degrees. A unit may be used.

<Conveyor collection unit>
Next, the transport table recovery unit 10 will be described with reference to FIGS.
FIG. 4 is a perspective view showing the carrier recovery unit and the rotation unit of the present embodiment. FIG. 5 is a perspective view showing a cylinder part of the transport table holding part of the present embodiment. FIG. 6 is a diagram illustrating a state in which the transfer table holding unit holds the transfer table. FIGS. 7A and 7B are diagrams for explaining the operation of the transport table holding unit. A shows a state where the holding table holding unit is in the protruding position, and B shows a state where the holding table holding unit is in the retracted position.

  As shown in FIG. 4, the transport table recovery unit 10 is configured by combining a downstream transport table recovery unit 10 </ b> A and an upstream transport table recovery unit 10 </ b> B in a straight line. In FIG. 4, a part of the upstream side carrier collection unit 10B (the end side connected to the other end of the third U-shaped unit 80 shown in FIG. 1) is not shown. Note that the downstream side carrier collection unit 10A and the upstream side carrier collection unit 10B are connected by an inter-unit joint (not shown).

  The downstream side carrier collection unit 10A and the upstream side carrier collection unit 10B are formed in a substantially rectangular parallelepiped frame shape with a plurality of ejector pipes 2 and a joint 3 that connects the ejector pipes 2.

  Further, the downstream side carrier recovery unit 10A and the upstream side carrier recovery unit 10B include a carrier base receiving unit 101, three short legs 102 that support the carrier base receiving unit 101, and three long legs 103, The plurality of reinforcing portions 107 are provided. Further, the transport table receiving unit 101 of the downstream transport table recovery unit 10 </ b> A and the upstream transport table recovery unit 10 </ b> B includes a first roller unit 108 and a roller support unit 109. The transport table receiving unit 101 includes a second roller unit 112 and a third roller unit 113. Among these configurations, the components other than the short leg portion 102 and the long leg portion 103 are the configurations of the first linear unit 30 described with reference to FIG. 3 (conveyance base receiving portion 301, reinforcing portion 307, first roller). 308, the roller support portion 309, the second roller portion 312, and the third roller portion 313), common reference numerals are assigned to the common components, and detailed description thereof is omitted.

  The short leg portions 102 of the downstream conveyance table collection unit 10 </ b> A and the upstream conveyance table collection unit 10 </ b> B are shorter than the long legs 103 and are located outside the production line 1. Further, the three short legs 102 are arranged at a predetermined distance in the extending direction of the pedestal long side 104, and support the both ends and the substantially central part of one pedestal long side 104, respectively. doing. Similarly, the three long leg portions 103 are also arranged at a predetermined distance in the extending direction of the pedestal long side portion 104, and both end portions and a substantially central portion of the other pedestal long side portion 104. Support. The three short leg portions 102 and the three long leg portions 103 are in the same plane and face each other in a direction orthogonal to the extending direction of the pedestal long side portion 104. Since the transport leg receiving unit 101 is supported by the short leg part 102 and the long leg part 103 as described above, as shown in FIG. In FIG. 4, the pedestal long side 104 located below is inclined so as to be disposed at a position lower than the other pedestal long side 104 (the pedestal long side 304 located above in FIG. 4). ing. In the production line 1, the transport table collection unit 10 is arranged such that one of the table receiving long side portions 104 positioned below is closer to the operator than the other table receiving long side portion 104 positioned above. .

  Moreover, the length of the short leg part 102 and the long leg part 103 is on the one end part side (the end part side connected to the other end part of the third U-shaped unit 80, the left side in FIG. 4) of the transport table recovery unit 10. The short leg portion 102 and the long leg portion 103 that are arranged are longer than the short leg portion 102 and the long leg portion 103 that are arranged on the other end side (the right side in FIG. 4) of the transport table collection unit 10. It is set to be. Further, the lengths of the short leg portion 102 and the long leg portion 103 arranged on the most other end side (the right side in FIG. 4) of the upstream conveyance table collection unit 10B are the one ends of the downstream conveyance table collection unit 10A. The length is set longer than the length of the short leg portion 102 and the long leg portion 103 arranged on the part side (left side in FIG. 4).

  When the downstream conveyance table collection unit 10A and the upstream conveyance table collection unit 10B are connected as described above, the first roller portion 108 of the downstream conveyance table collection unit 10A and the first conveyance unit collection unit 10B of the upstream conveyance table collection unit 10B. The one roller portion 108 is arranged in a straight line extending obliquely downward from one end portion side to the other end portion side of the transport table recovery unit 10. For this reason, the conveyance table 90 placed on the conveyance table collection unit 10 slides from the one end side to the other end side of the conveyance table collection unit by its own weight. In addition, the arrow D in FIG. 4 has shown the moving direction of the conveyance stand 90 by dead weight.

  In addition, as shown in FIG. 4, a transport table holding unit 120 is provided below the downstream transport table recovery unit 10 </ b> A. The transport table holding unit 120 includes a pair of cylinder parts 121 and 121, a pump (not shown), and a foot switch 118 (see FIG. 4). The pump supplies air to the pair of cylinder parts 121 and 121. The foot switch 118 is operated by an operator when the pair of cylinder portions 121 and 121 are expanded and contracted. The pair of cylinder portions 121 and 121 are fixed to a reinforcing portion 107 provided between the opposing short leg portion 102 and long leg portion 103 via a bracket 119.

  Next, the pair of cylinder parts 121 and 121 will be described with reference to FIG. In addition, since a pair of cylinder part 121,121 is comprised substantially symmetrically, below, about one cylinder part 121 provided in the other end part side (right side of FIG. 4) of the conveyance stand collection | recovery unit 10 below. The description of the other cylinder part 121 will be omitted.

  As shown in FIG. 5, the cylinder part 121 includes a cylinder part body 122 having a cylinder tube (not shown) therein, a piston part 123 inserted into the cylinder part body, a roller mounting part 124, and a roller part 125. And.

  The roller portion 125 is provided with a substantially rectangular parallelepiped roller base portion 126, one end portion of the roller base portion 126, and a pair of roller shafts 127 extending in the vertical direction and rotatably attached to the upper and lower portions of the roller shaft 127. And rollers 128, 128. An insertion hole (not shown) is provided at the other end of the roller base 126.

  The roller mounting portion 124 includes an upper surface portion 129 and a lower surface portion 130 that face each other in the vertical direction, and a connecting portion 131 that connects the upper surface portion 129 and the lower surface portion 130, and is formed in a substantially U shape. The connecting part 131 is fixed to the tip part of the piston part 123. Further, a support shaft 132 that is supported by the upper surface portion 129 and the lower surface portion 130 and extends substantially in the vertical direction is provided at one end portion of the roller mounting portion 124.

  The other end portion of the roller base portion 126 is disposed between the upper surface portion 129 and the lower surface portion 130 of the roller attachment portion 124, and the support shaft 132 of the roller attachment portion 124 is inserted into the insertion hole of the roller base portion 126. Thus, the roller portion 125 is attached to the roller attachment portion 124 so as to be rotatable about the support shaft 132. In the present embodiment, a fixing mechanism including a thread groove (not shown) and a nut (not shown) formed in a portion of the support shaft 132 protruding downward from the lower surface portion 130 is provided. By tightening the nut of the fixing mechanism, the roller portion 125 is fixed so that it does not move relative to the roller mounting portion 124 (so as not to rotate). Therefore, in the present embodiment, the roller portion 125 is fixed so as not to move relative to the roller mounting portion 124 at a predetermined rotational position.

  When air is supplied from the pump into the cylinder tube of the cylinder portion main body 122 and the air pressure in the cylinder tube increases, the piston portion 123 extends.

  When the foot switch 118 (see FIG. 4) is operated (stepped on) by an operator and the foot switch 118 is turned on from the off state, the deaeration valve (not shown) provided in the cylinder tube is opened, and the cylinder The air in the tube is degassed. When the air in the cylinder tube is degassed and the air pressure in the cylinder tube decreases, the piston portion 123 contracts. When the foot switch 118 is not stepped on by the operator, the foot switch 118 is set to the off state, the deaeration valve is closed, and the pump is in the cylinder tube until the air pressure in the cylinder tube reaches a predetermined air pressure. To supply air.

  As shown in FIGS. 6 and 7A, the transport table holding unit 120 configured in this way is placed on the transport table recovery unit 10 and, by its own weight, a transport table recovery unit that is a predetermined holding position in the present embodiment. The movement from the holding position of the transport table 90 moved to the other end of 10 is restricted. In FIG. 6, only the transfer table 90 held at the holding position is shown, and the subsequent transfer table 90 is not shown. In FIGS. 6 and 7, an arrow D indicates the conveyance direction of the conveyance table 90.

<Operation of transport table holder>
Next, the operation of the transport table holding unit 120 will be described in detail with reference to FIG. As shown in FIG. 7A, when the foot switch 118 is in the OFF state and air is supplied from the pump and the air pressure in the cylinder tube of the cylinder body 122 increases, the piston part 123 extends. At this time, the front ends of the pair of roller portions 125, 125 of the transport table holding unit 120 protrude forward along a direction substantially orthogonal to the transport direction of the transport table 90, and the notch portion of the transport table 90 in the holding position. 94 and 94 are formed, and both ends of the transport table 90 in the transport direction are sandwiched. Thereby, the movement of the transport table 90 from the holding position is restricted. In the present embodiment, the positions of the tip portions of the roller portions 125 and 125 when the conveyance table 90 is sandwiched may be referred to as a protruding position.

  As shown in FIG. 7B, when the foot switch 118 is operated (stepped on) to change from the off state to the on state, the air in the cylinder tube of the cylinder body 122 is degassed, and the air pressure in the cylinder tube decreases. The piston part 123 contracts. As a result, the tip portions of the pair of roller portions 125, 125 of the transport table holding unit 120 move from the protruding position to a retracted position where the movement of the transport table 90 is not restricted.

  Further, as shown in FIG. 7B, when the pair of roller portions 125, 125 move to the retracted position, the transport base 90 moves to the rotating unit 20 by its own weight. Further, the subsequent transport table 90 moves to the holding position at the other end of the transport table recovery unit 10 by its own weight. The roller 128 in the one roller portion 125 on the rotation unit 20 side in the retracted position rotates in contact with the back surface of the transport table 90 that moves to the rotation unit 20. For this reason, the conveyance stand 90 can be easily moved to the rotation unit 20 by its own weight. Further, the roller 128 of the other roller unit 125 rotates in contact with the back surface of the subsequent transport table 90. For this reason, the subsequent conveyance stand 90 can be easily moved to the holding position by its own weight.

  The piston portion when the foot switch 118 is set from the on state to the off state while the transport table 90 moves to the rotation unit 20 and the subsequent transport table 90 moves to the holding position. The extension of 123 is restricted because the pair of roller portions 125 and 125 are in contact with the transport table 90 that moves to the rotation unit 20 and the subsequent transport table 90 that moves to the holding position. Thereafter, when the entire conveyance table 90 reaches the rotation unit 20 and the subsequent conveyance table 90 reaches the holding position, the pair of roller portions 125 and 125 do not come into contact with the back surface of each conveyance table 90. As a result, the piston portion 123 is extended, and the tip portions of the pair of roller portions 125 and 125 are formed at the positions where the cutout portions 94 and 94 of the succeeding transport table 90 reach the holding position. Both ends in the transport direction are sandwiched, and movement of the subsequent transport platform 90 from the holding position is restricted.

<Rotating unit>
Next, the rotation unit 20 will be described with reference to FIGS. 8 and 9. FIG. 8 is a perspective view of the rotation unit of the present embodiment, and shows a state where the lifting / lowering carriage receiving unit 201 is lowered. FIG. 9 is a perspective view of the rotation unit of the present embodiment, and shows a state where the lifting / lowering carriage receiving unit 201 is raised.

  As shown in FIG. 8, the rotation unit 20 is rotatable about a support shaft 21 and supports a substantially rectangular frame-shaped elevating / conveying base receiving part 201 and the elevating / conveying base receiving part 201 so as to be movable up and down. Elevating and lowering support portion 202.

  Here, the support shaft 21 is a shaft-like member extending in a substantially vertical direction, and a lift switch 203 is provided in a substantially central portion in the vertical direction. The up / down switch 203 is a push-type switch, and is pressed and turned on by the turning unit 20 when the turning unit 20 is at the transfer position (the position of the turning unit 20 indicated by a two-dot chain line in FIG. 1). When the rotation unit 20 is not in the transfer position and is not pressed by the rotation unit 20, the state is set to the off state.

  The elevating support part 202 has a bottom frame part 204, a standing frame part 205, and an inclined frame part 206. The bottom frame portion 204 is formed in a substantially rectangular frame shape, and includes a pair of bottom frame long side portions 207 and 207, and a pair of bottom frame short side portions 208 and 208 that are shorter than the bottom frame long side portion 207. have. A wheel 209 is provided below each corner of the bottom frame portion 204.

  The standing frame portion 205 is formed in a substantially rectangular frame shape and stands in a substantially vertical direction. The standing frame portion 205 has a pair of standing frame long side portions 210 and 210 extending in a substantially vertical direction, and the length is shorter than the standing frame long side portion 210, and the standing frame long side portions 210 and 210. And a pair of standing frame short side portions 211 and 211 for connecting the two. In the present embodiment, one bottom frame long side portion 207 of the bottom frame portion 204 forms a lower standing frame short side portion 211.

  Two small frame portions 212, 212 erected in a substantially vertical direction are provided on the upper standing frame short side portion 211 at a predetermined distance. The small frame portions 212 and 212 extend in a substantially vertical direction, and a pair of vertical pipes 213 and 213 whose lower end portions are connected to the standing frame short side portion 211 and a connection pipe that connects the vertical pipes 213 and 213. 214.

  In addition, shaft connection pipes 215 and 215 that rotatably connect the rotation unit 20 to the support shaft 21 are provided on the pair of standing frame short sides 211 and 211.

  In addition, when the rotation unit 20 is at the transfer position (the position of the rotation unit 20 indicated by a two-dot chain line in FIG. 1), one standing frame long side portion 210 (located on the first linear unit 30 side) In FIG. 8, the standing frame long side portion 210) located on the right side is provided with a standing drop preventing portion 217 extending obliquely upward. The standing fall prevention portion 217 is formed in a substantially U shape, and one end portion is fixed to the standing frame long side portion 210 and extends diagonally upward, and a pair of fall prevention pipes 218. , 218, and a connecting pipe 219 for connecting the other end of the 218.

  The inclined frame portion 206 includes a pair of vertical roller portions 220 and 220, a pair of inclined pipes 221 and 221, an upper support portion 222, a lower support portion 223, and an elevating cylinder portion 224.

  The pair of vertical roller portions 220 and 220 are vertically long members, the upper end portion in the longitudinal direction is connected to the connection pipe 214 of the small frame portion 212, and the lower end portion is the other of the bottom frame portion 204 (the front side in FIG. 8). It is connected to the bottom frame long side portion 207. The vertical roller unit 220 is provided with a plurality of rollers that are pivotally supported by a shaft (not shown) extending in the short direction so as to be rotatable.

  The pair of inclined pipes 221 and 221 has an upper end connected to the connection pipe 214 of the small frame portion 212 between the pair of vertical roller portions 220 and 220, and a lower end portion connected to the other of the bottom frame portion 204 (the front side in FIG. 8). ) Of the bottom frame long side portion 207.

  The upper support portion 222 is a horizontally long and substantially rectangular flat plate-like member, and both end portions in the longitudinal direction are fixed to the back surface of a substantially central portion in the vertical direction of the pair of vertical roller portions 220 and 220. The lower support portion 223 is a horizontally long and substantially rectangular flat plate-like member, and both end portions in the longitudinal direction are fixed to lower back surfaces of the pair of vertical roller portions 220 and 220.

  The lifting / lowering cylinder part 224 includes a substantially cylindrical lifting / lowering cylinder part body 225 extending in the vertical direction, a lifting / lowering piston part 226 having one end inserted in the cylinder part body, and a cylinder tube ( And a pump (not shown) for supplying air to (not shown). The upper part of the elevating cylinder part body 225 is fixed to the upper support part 222, and the lower part is fixed to the lower support part 223. Thus, the elevating cylinder unit body 225 is supported by the vertical roller units 220 and 220.

  The other end portion of the lifting / lowering piston portion 226 forms a substantially flat push-up plate portion 227 and is connected to the lifting / lowering carrier receiving portion 201. When the elevating switch 203 is set to the on state, a deaeration valve (not shown) provided in the cylinder tube is closed, and the pump supplies air into the cylinder tube of the elevating cylinder unit body 225. When the air pressure in the cylinder tube increases, the elevating piston portion 226 extends. As a result, as shown in FIG. 9, the lifting / lowering carriage receiving part 201 connected to the push-up plate part 227 of the lifting / lowering piston part 226 rises. The pump stops supplying air when the air pressure in the cylinder tube reaches a predetermined air pressure.

  When the up / down switch 203 is set to an off state, a deaeration valve (not shown) provided in the cylinder tube is opened, and the air in the cylinder tube is deaerated. As a result, the air pressure in the cylinder tube is lowered and the elevating piston portion 226 is contracted, and accordingly, the elevating / conveying base receiving portion 201 connected to the push-up plate portion 227 is lowered.

  The elevating / conveying base receiving unit 201 includes a pair of elevating long side portions 230 and 230 extending in the vertical direction and a pair of elevating short side portions 231 and 231 having a length shorter than the elevating long side portion 230. The elevating short side portions 231 and 231 connect the upper end portion and the lower end portion of the pair of elevating long side portions 230 and 230. Further, a push-up plate portion 227 of the lift piston portion 226 is connected to the upper lift short side portion 231. As a result, as the elevating piston unit 226 expands and contracts, the elevating / conveying platform receiving unit 201 moves up and down.

  Further, a flat sliding plate portion 230a is provided on the back surface of the elevating long side portion 230 from the substantially central portion in the vertical direction to the lower portion. The sliding plate portion 230a is in contact with the circumferential surface of the roller of the vertical roller portion 220, and slides on the circumferential surface of the roller of the vertical roller portion 220 when the lifting / lowering support table receiving portion 201 moves up and down. In addition, the raising / lowering operation | movement of the raising / lowering conveyance stand receiving part 201 is later demonstrated with reference to FIG.9 and FIG.10.

  Further, the lifting / lowering carrier receiving part 201 has a lifting / lowering first roller part 232 and a lifting / lowering roller support part 233 that supports the lifting / lowering first roller part 232. The elevating first roller part 232 is a horizontally long member, and is arranged so that the longitudinal direction thereof is parallel to the elevating short side part 231 of the elevating / conveying base receiving part 201. The length of the elevating first roller part 232 in the longitudinal direction is set to be slightly longer than the elevating short side part 231.

  As shown in FIG. 8, the first elevating roller portion 232 has a substantially U-shaped roller portion main body 234 that is open at the top, a roller 235, and a roller side fall prevention portion 236. ing.

  The roller 235 is pivotally supported by a shaft (not shown) extending in the short direction of the elevating first roller unit 232 provided in the roller body 234, and extends in the longitudinal direction of the elevating first roller unit 232. A plurality are provided. The upper part of the roller 235 is exposed from the opening of the roller unit body 234, and when the transport table 90 (see FIG. 2) is placed on the lift transport table receiving unit 201, the peripheral surface of the roller 235 is the transport table body 91. In contact with the lower end of.

  The roller portion main body 234 has a pair of side surface portions 237 and 237 and a bottom surface portion 238 connecting the pair of side surface portions 237 and 237.

  The roller-side fall prevention unit 236 is configured to move the first raising / lowering roller unit 232 located on the transport table recovery unit 10 side when the rotation unit 20 is in the receiving position (the position of the rotation unit 20 indicated by a solid line in FIG. 1). It is provided at one end (the end located on the left side in FIG. 8). The roller side fall prevention part 236 includes a fall prevention part main body 239 and a shaft part 240.

  The shaft portion 240 is a shaft-like member supported by the pair of side surface portions 237 and 237. The fall prevention part main body 239 is a substantially flat plate-like member, and is rotatably supported by the shaft part between the pair of side surface parts 237 and 237. Further, the fall prevention unit main body 239 has a collection side end 239a (located on the transport table collection unit 10 side) when the rotation unit 20 is in the receiving position (the position of the rotation unit 20 indicated by a solid line in FIG. 1). 8 is formed so that the weight of the end portion located on the left side is heavier than the weight of the inner end portion 239b which is the opposite end portion. For this reason, the fall prevention unit main body 239 is usually a circuit in which the collection side end 239a is in contact with the bottom surface part 238 of the roller unit main body 234 and the inner end 239b is located above the collection side end 239a. In the moving position. Further, the inner end portion 239b at this time is located above the peripheral surface of the roller 235 that contacts the transport table 90. In the present embodiment, the rotation position of the inner end 239b at this time may be referred to as a fall prevention position. The operation of the roller side fall prevention unit 236 will be described in detail later with reference to FIG.

  The raising / lowering roller support part 233 is provided in the raising / lowering short side part 231 located in the downward direction in the raising / lowering conveyance stand receiving part 201, and supports the raising / lowering 1st roller part 232 so that it may become parallel to the raising / lowering short side part 231. . The elevating roller support part 233 includes a pair of projecting parts 241 and 241 that project obliquely upward from both ends in the extending direction of the elevating short side part 231 positioned below, and a fall prevention part 242. The fall prevention part 242 extends in parallel with the elevating short side part 231 above the projecting part 241, and both ends in the extending direction are bent downward to be connected to one end part in the projecting direction of the projecting part 241. It is a U-shaped member.

  On both ends of the pair of projecting portions 241 and 241, both end portions in the longitudinal direction of the elevating first roller portion 232 are placed. The fall prevention unit 242 indicates that when the transport table 90 (see FIG. 2) is placed on the lifting / lowering carrier support unit 201, the fall prevention unit 242 indicates that the transport table 90 slides down from the lifting / lowering transport table receiving unit 201. Prevent by contact.

  Further, the lifting / lowering table receiving unit 201 has a lifting / lowering second roller portion 243 and a lifting / lowering third roller portion 244. The second raising / lowering roller part 243 is a horizontally long member, and is arranged so that the longitudinal direction is parallel to the extending direction of the raising / lowering short side part 231. Both end portions in the longitudinal direction of the elevating second roller portion 243 are supported by a substantially central portion in the vertical direction of the pair of elevating long side portions 230 and 230 of the elevating / conveying base receiving portion 201. The elevating second roller portion 243 is provided with a plurality of rollers that are pivotally supported by a shaft (not shown) extending in the short direction so as to be rotatable.

  When the transport table 90 (see FIG. 2) is placed on the lift transport table receiving unit 201, the peripheral surface of the roller of the lift second roller unit 243 is below the other surface of the transport table main body 91 (the back surface in FIG. 2). Contact.

  The elevating third roller portion 244 is a horizontally long member, and is disposed above the elevating second roller portion 243 so that the longitudinal direction is parallel to the extending direction of the elevating short side portion 231. Both ends of the elevating third roller portion 244 in the longitudinal direction are supported by the upper portions in the vertical direction of the pair of elevating long side portions 230 and 230 of the elevating / conveying base receiving portion 201. The elevating third roller portion 244 is provided with a plurality of rollers that are pivotally supported by a shaft (not shown) extending in the short direction so as to be rotatable.

  When the transport table 90 (see FIG. 2) is placed on the lift transport table receiving unit 201, the peripheral surface of the roller of the lift third roller unit 244 is on the upper surface of the other surface of the transport table body 91 (the back surface in FIG. 2). Contact.

  As described above, the roller of the first raising / lowering roller portion 232 comes into contact with the lower end portion of the carrier table main body 91, and the roller of the second raising / lowering roller portion 243 is on the other surface (the back surface in FIG. 2). The roller of the third elevating third roller portion 244 comes into contact with the lower portion, and the upper portion of the other surface of the conveyance base body 91 comes into contact with the lower portion. Therefore, the operator can easily slide the transfer table 90, move the transfer table 90 from the transfer table collection unit 10 and place it on the elevating transfer table receiving unit 201. One linear unit 30 can be moved.

<Raising / lowering operation of lifting / lowering carriage support>
Next, with reference to FIG.9 and FIG.10, about the raising / lowering operation | movement of the raising / lowering conveyance base receiving part 201, operation | movement when the raising / lowering conveyance base receiving part 201 raises is demonstrated to an example. FIG. 10 is a diagram for explaining the operation of the rotation unit of the present embodiment, where A indicates a state where the rotation unit is in the receiving position, B indicates a state where the rotation unit is in the transfer position, C has shown the state which the conveyance stand support part rose from the state of B. FIG.

  As shown in FIG. 10A, when the rotation unit 20 is in the receiving position (the position of the rotation unit 20 shown by a solid line in FIG. 1), the up / down switch 203 is set to an off state, and the up / down cylinder unit 224 ( The pump of FIG. 8) stops supplying air into the cylinder tube. Further, a deaeration valve (not shown) provided in the cylinder tube is opened, and air in the cylinder tube is deaerated. Accordingly, the elevating piston part 226 (see FIG. 9) is contracted, and the elevating / conveying base receiving part 201 connected to the push-up plate part 227 (see FIG. 9) is located at a predetermined lowered position.

  In the present embodiment, as shown in FIG. 4, the first raising / lowering roller part 232 of the raising / lowering carrier receiving part 201 in the lowered position is located on the rotating unit 20 side of the first roller part 108 of the downstream carrier collecting unit 10A. It is in a position lower than the end. Accordingly, the height of the transport table 90 supported by the transport table recovery unit 10 (the distance between the lower end of the transport table 90 and the installation surface of the production line 1) is the first height, and the lifting transport table receiving unit at the lowered position. When the height of the transfer table 90 when placed on 201 is the third height, the third height is lower (smaller) than the first height. That is, the rotation unit 20 in which the lifting / lowering carriage receiving part 201 is in the lowered position supports the carriage 90 at a third height lower than the first height. For this reason, the conveyance table 90 slides and moves by its own weight from the conveyance table collection unit 10 to the rotation unit 20.

  When the operator turns the turning unit 20 shown in FIG. 10A to the transfer position (the position of the turning unit 20 indicated by a two-dot chain line in FIG. 1) as shown in FIG. 10B, FIG. 9 shows. In this manner, the up / down switch 203 is pressed by the standing frame long side portion 210 and set to the on state.

  When the up / down switch 203 is set to the on state, a deaeration valve (not shown) provided in the cylinder tube of the up / down cylinder unit 224 is closed, and the pump of the up / down cylinder unit 224 supplies air into the cylinder tube. . When the air pressure in the cylinder tube increases, the elevating piston part 226 extends as shown in FIG. As a result, as shown in FIG. 9 and FIG. 10C, the lifting / lowering carriage receiving part 201 connected to the push-up plate part 227 of the lifting / lowering piston part 226 rises to a predetermined raised position.

  The raising / lowering first roller part 232 of the raising / lowering conveyance base receiving part 201 in the raised position is at a height substantially equal to the first roller part 308 (see FIG. 3) of the first linear unit 30. Therefore, the height of the transport table 90 supported by the first linear unit 30 (the distance between the lower end of the transport table 90 and the installation surface of the production line 1) is the second height, and the lifting transport table is received at the raised position. When the height of the carrier 90 when placed on the unit 201 is the fourth height, the second height and the fourth height are substantially equal. That is, the rotation unit 20 in which the lifting / lowering carriage receiving part 201 is in the raised position supports the carriage 90 at a fourth height that is substantially equal to the second height. The operator slides the transfer table 90 supported by the lift transfer table receiving unit 201 at the ascending position and moves it to the transfer table receiving unit 301 of the first linear unit 30. Note that the standing drop prevention unit 217 slides the transport table 90 from the lift transport table receiving unit 201 in the raised position and moves the transport table 90 to the transport table receiving unit 301 of the first linear unit 30. It is formed so as not to contact.

  When the operator rotates the rotating unit 20 from the state shown in FIG. 10C to the receiving position, the lift switch 203 is released from the pressing of the standing frame long side portion 210 and is set to the off state. A deaeration valve (not shown) provided in the tube is opened, and the air in the cylinder tube is deaerated. As a result, the air pressure in the cylinder tube decreases, and the lifting / lowering piston part 226 contracts, and the lifting / lowering carriage receiving part 201 connected to the push-up plate part 227 descends to the predetermined lowered position shown in FIG. 10A.

<Operation of roller side fall prevention part>
Next, the operation of the roller side fall prevention unit 236 will be described with reference to FIG. FIG. 11 is a diagram for explaining the operation of the fall prevention unit according to the present embodiment, in which A shows a state before the carriage is moved to the rotating unit, and B is a figure where the carrier is moved to the rotating unit. C shows the state after the transport table has moved to the rotating unit.

  As shown in FIG. 11A, the inner end 239b of the fall prevention unit main body 239 is moved before the transfer table 90 moves to the rotation unit 20, that is, before the transfer table 90 is placed on the lift transfer table receiving unit 201. In the fall prevention position. That is, the inner end portion 239b is positioned above the collection side end portion 239a, and the inner end portion 239b is higher than the peripheral surface of the elevating first roller portion 232 that is in contact with the conveyance table 90 of the roller 235. positioned. Further, the lower end portion on the collection side end portion 239a side is in contact with the bottom surface portion 238 of the roller portion main body 234.

  As shown in FIG. 11B, when the transport table 90 is moved to the rotation unit 20, that is, when the transport table 90 is placed on the lift transport table receiving unit 201, the inner end of the fall prevention unit main body 239. 239b comes into contact with the lower end of the moving carriage 90 and is pushed downward. For this reason, the fall prevention unit main body 239 rotates so that the inner end 239b has a height substantially equal to the peripheral surface of the roller 235 that contacts the transport table 90. The rotation position of the inner end portion 239b at this time when the inner end portion 239b is located below the lower end portion of the transport table 90 may be referred to as a retracted position.

  As shown in FIG. 11C, after the transport table 90 is moved to the rotation unit 20, that is, after the transport table 90 is placed on the lift transport table receiving unit 201, the inner end 239b of the fall prevention unit main body 239 is It is released from the pressing of the lower end portion of the transport table 90 and rotates from the retracted position to the fall preventing position. Further, the lower end portion on the collection side end portion 239a side is in contact with the bottom surface portion 238 of the roller portion main body 234.

  When the operator rotates the rotation unit 20 supporting the transfer table 90 from the state shown in FIG. 11C to the transfer position (the position of the rotation unit 20 indicated by a two-dot chain line in FIG. 1), the rotation is performed. In some cases, the carrier 90 moves in the direction of arrow E shown in FIG. When the transport table 90 moves in the direction of arrow E, the lower end of the transport table 90 comes into contact with the inner end 239b of the roller side fall prevention unit 236 at the fall prevention position, and the inner end of the roller side fall prevention unit 236 is contacted. The part 239b is pushed to the lower end part of the transport table 90. At this time, since the lower end portion of the fall prevention portion main body 239 on the collection side end portion 239a side is in contact with the bottom surface portion 238 of the roller portion main body 234, the roller side fall prevention portion 236 is pushed by the lower end portion of the transport base 90. However, it does not rotate and restricts the movement of the carrier 90 in the direction of arrow E. As a result, it is possible to suppress the conveyance table 90 from falling from the rotation unit 20 while the rotation unit 20 is rotating.

  Note that the standing drop prevention unit 217 restricts the movement of the conveyance table 90 in the direction opposite to the arrow E (see FIG. 11C) when the elevation conveyance table receiving unit 201 is in the lowered position. That is, even when the transport table 90 moves in the direction opposite to the arrow E due to the reaction of the transport table 90 coming into contact with the inner end 239b of the roller side fall prevention unit 236 during the rotation of the rotation unit 20, When the prevention unit 217 comes into contact with the transport table 90, the transport table 90 can be prevented from falling from the rotation unit 20.

<Switching unit>
Next, the switching unit 400 will be described with reference to FIG. FIG. 12 is a perspective view of the switching unit of the present embodiment.

  As shown in FIG. 12, the switching unit 400 includes a substantially cross-shaped switching transport base receiving portion 401 and a switching lift support portion 402 that supports the switching transport base receiving portion 401 so as to be lifted and lowered.

  The switching elevating support portion 402 includes a bottom frame portion 403, a front standing frame portion 404, a rear standing frame portion 405, and an inclined frame portion 406. The bottom frame portion 403 is formed in a substantially rectangular frame shape, and includes a pair of bottom frame long side portions 407 and 407, and a pair of bottom frame short side portions 408 and 408 that are shorter than the bottom frame long side portion 407. have. Below each corner of the bottom frame 403, wheels 409 are provided.

  The front standing frame 404 is formed in a substantially rectangular frame shape, and is erected in a substantially vertical direction. The front standing frame 404 has a pair of front standing frame short sides 410, 410 extending in a substantially vertical direction and a length longer than the front standing frame short side 410, and the front standing frame short side A pair of front standing frame long side portions 411 and 411 connecting the portions 410 and 410 (in FIG. 12, illustration of the front standing frame long side portion 411 located above is omitted). In the present embodiment, one bottom frame long side portion 407 of the bottom frame portion 403 forms a lower front standing frame long side portion 411.

  The rear standing frame portion 405 is formed in a substantially rectangular frame shape and stands in a substantially vertical direction. The rear standing frame portion 405 includes a pair of rear standing frame long side portions 412 and 412 extending in a substantially vertical direction, and the length is shorter than the rear standing frame long side portion 412. It has a pair of rear standing frame short side parts 413 and 413 connecting the parts 412 and 412. The rear standing frame long side portions 412 and 412 and the front standing frame short side portions 410 and 410 face each other in the extending direction of the bottom frame short side portion 408. In the present embodiment, the other bottom frame long side portion 407 (the rear bottom frame long side portion 407 in FIG. 12) of the bottom frame portion 403 forms the lower rear standing frame short side portion 413.

  The inclined frame portion 406 includes a pair of vertical roller portions 414, 414, a pair of inclined pipes 415, 415, an upper support portion 416, a lower support portion (not shown), and a switching cylinder portion 417. ing.

  The pair of vertical roller portions 414 and 414 are vertically long members, the upper end portion in the longitudinal direction is connected to the upper rear standing frame short side portion 413 and the lower end portion is the front standing frame long side portion 411 (FIG. 12). Are not shown). The vertical roller portion 414 is provided with a plurality of rollers that are pivotally supported by a shaft (not shown) extending in the lateral direction so as to be rotatable.

  The pair of inclined pipes 415 and 415 has an upper end connected to the upper rear frame short side 413 and a lower end between the pair of vertical roller portions 414 and 414 and a lower end of the front frame long side 411 ( 12 is omitted).

  The upper support portion 416 is a horizontally long and substantially rectangular flat plate-like member, and both end portions in the longitudinal direction are fixed to the back surface of a substantially central portion in the vertical direction of the pair of vertical roller portions 414 and 414. The lower support portion is a horizontally long, substantially rectangular flat plate-like member, and both end portions in the longitudinal direction are fixed to lower back surfaces of the pair of vertical roller portions 414, 414.

  The switching cylinder part 417 includes a substantially cylindrical switching cylinder part main body 418 extending in the vertical direction, a switching piston part 419 having one end inserted in the cylinder part main body, and a cylinder tube ( It has a pump (not shown) for supplying air to an illustration (not shown) and a lift switch (not shown). The upper part of the switching cylinder part main body 418 is fixed to the upper support part 416, and the lower part is fixed to the lower support part. Accordingly, the switching cylinder portion main body 418 is supported by the vertical roller portions 414 and 414.

  The other end portion of the switching piston portion 419 forms a substantially flat push-up plate portion 420 and is connected to the switching conveyance base receiving portion 401. When the lift switch is set to the on state, a deaeration valve (not shown) provided in the cylinder tube is closed, and the pump supplies air into the cylinder tube of the switching cylinder unit body 418. When the air pressure in the cylinder tube increases, the switching piston portion 419 extends. As a result, the switching carrier receiving part 401 connected to the push-up plate part 420 of the switching piston part 419 rises. The pump stops supplying air when the air pressure in the cylinder tube reaches a predetermined air pressure.

  When the lift switch is set to the OFF state, a deaeration valve (not shown) provided in the cylinder tube is opened, and the air in the cylinder tube is deaerated. As a result, the air pressure in the cylinder tube is lowered and the switching piston portion 419 is contracted, and accordingly, the switching transport base receiving portion 401 connected to the push-up plate portion 420 is lowered.

  The switching transport base receiving unit 401 includes a pair of switching long side portions 421 and 421 extending in the vertical direction and a pair of switching short side portions 422 and 422 having a length shorter than the switching long side portion 421 (positioned downward in FIG. 12). (The illustration of the switching short side portion 422 is omitted). The switching short side portions 422 and 422 connect the upper end portion and the lower end portion of the pair of switching long side portions 421 and 421.

  Further, the switching carrier receiving unit 401 includes a left roller support unit 423 and a right roller support unit 424. The left roller support portion 423 is provided on the left side of one switching long side portion 421 (one switching long side portion 421 located on the left side in FIG. 12), and extends left in parallel with the extending direction of the switching long side portion 421. The support pipe 425 has a pair of connection pipes 426 and 426 that connect both ends of the left support pipe 425 in the vertical direction to the upper and lower portions in the extending direction of one switching long side portion 421.

  The right roller support portion 424 is provided on the right side of the other switching long side portion 421 (one switching long side portion 421 located on the right side in FIG. 12), and extends right in parallel with the extending direction of the switching long side portion 421. A support pipe 427 and a pair of connection pipes 428 and 428 for connecting both ends in the vertical direction of the right support pipe 427 to an upper part and a lower part in the extending direction of the other switching long side part 421 are provided.

  In addition, the switching transport base receiving unit 401 has an inner connecting part 429. The inner connecting portion 429 extends between the pair of switching long side portions 421 and 421 in parallel with the switching short side portion 422, and both ends in the extending direction are connected to the upper portions of the switching long side portions 421 and 421. ing. A push-up plate portion 420 of the switching piston portion 419 is connected to a substantially central portion in the extending direction of the inner connecting portion 429. As a result, the switching carrier receiving portion 401 moves up and down as the switching piston portion 419 expands and contracts.

  Further, on the back surface of the switching long side portion 421, a flat sliding plate portion 421a is provided at a substantially central portion in the extending direction over a predetermined distance. The sliding plate portion 421a is in contact with the circumferential surface of the roller of the vertical roller portion 414, and slides on the circumferential surface of the roller of the vertical roller portion 414 when the switching transport base receiving portion 401 moves up and down.

  In addition, the switching transport base receiving unit 401 includes a switching first roller unit 430 and a roller support unit 431 that supports the switching first roller unit 430. The switching first roller part 430 is a horizontally long member, and is arranged so that the longitudinal direction thereof is parallel to the extending direction of the switching short side part 422. The length of the switching first roller part 430 in the longitudinal direction is such that the switching short side part 422 of the switching transport base receiving part 401, the connection pipe 426 of the left roller support part 423, the connection pipe 428 of the right roller support part 424, Is set to be approximately equal to the combined length. The switching first roller portion 430 is provided with a plurality of rollers that are pivotally supported by a shaft (not shown) extending in the short direction so as to be rotatable. When the transport table 90 (see FIG. 2) is placed on the switching transport table receiving unit 401, the peripheral surface of the roller of the switching first roller unit 430 comes into contact with the lower end of the transport table main body 91.

  The roller support portion 431 is provided in a switching short side portion 422 (not shown) positioned below, and the longitudinal direction of the switching first roller portion 430 and the extending direction of the switching short side portion 422 are parallel to each other. As such, the switching first roller unit 430 is supported. The roller support portion 431 includes a pair of projecting portions 432 and 432 that project obliquely upward from both ends in the extending direction of the switching short side portion 422, and a fall prevention portion 433.

On both ends of the pair of projecting portions 432 and 432, both end portions in the longitudinal direction of the switching first roller portion 430 are placed.
The fall prevention part 433 extends in parallel with the switching short side part 422 above the projecting part 432, and both ends in the extending direction are bent downward to be connected to one end part in the projecting direction of the projecting part 432. It is a U-shaped member. The fall prevention unit 433 indicates that when the transport table 90 (see FIG. 2) is placed on the switching transport table receiving unit 401, the fall prevention unit 433 detects that the transport table 90 slides down from the switching transport table receiving unit 401. Prevent by contact.

  Further, the switching carrier receiving unit 401 includes a switching second roller unit 434, a switching third roller unit 435, a switching fourth roller unit 436, and a switching fifth roller unit 437.

  The switching second roller portion 434 is a horizontally long member, and is disposed such that the longitudinal direction is parallel to the extending direction of the switching short side portion 422. Both ends in the longitudinal direction of the switching second roller portion 434 are supported by lower portions in the extending direction of the pair of switching long side portions 421 and 421. The switching second roller portion 434 is provided with a plurality of rollers that are pivotally supported by a shaft (not shown) extending in the short direction so as to be rotatable.

  The switching third roller portion 435 is a horizontally long member, and is disposed above the switching second roller portion 434 so that the longitudinal direction is parallel to the extending direction of the switching short side portion 422. Both ends in the longitudinal direction of the switching third roller portion 435 are supported by upper portions in the extending direction of the pair of switching long side portions 421 and 421. The switching second roller portion 434 is provided with a plurality of rollers that are pivotally supported by a shaft (not shown) extending in the short direction so as to be rotatable.

  The switching fourth roller portion 436 is a horizontally long member, and is arranged so that the longitudinal direction is parallel to the extending direction of the switching short side portion 422. One end portion of the switching fourth roller portion 436 in the longitudinal direction is connected to the left support pipe 425 of the left roller support portion 423, and the other end portion is one of the switching long side portions 421 (one on the left side in FIG. 12). The switching long side portion 421) is connected to a substantially central portion in the extending direction. The switching fourth roller portion 436 is provided with a plurality of rollers that are pivotally supported by a shaft (not shown) extending in the short direction so as to be rotatable.

  The switching fifth roller portion 437 is a horizontally long member, and is arranged so that the longitudinal direction is parallel to the extending direction of the switching short side portion 422. One end portion of the switching fifth roller portion 437 in the longitudinal direction is connected to the right support pipe 427 of the right roller support portion 424, and the other end portion is the other switching long side portion 421 (one on the right side in FIG. 12). The switching long side portion 421) is connected to a substantially central portion in the extending direction. The switching fifth roller portion 437 is provided with a plurality of rollers that are pivotally supported by a shaft (not shown) extending in the short direction so as to be rotatable.

  When the transport table 90 (see FIG. 2) is placed on the switching transport table receiving unit 401 configured as described above, the roller of the switching first roller unit 430 comes into contact with the lower end of the transport table main body 91. Further, the switching second roller unit 434, the switching third roller unit 435, the switching fourth roller unit 436, and the switching fifth roller unit 437 are in contact with the other surface (the back surface in FIG. 2) of the transport base body 91. For this reason, the operator can easily slide the transfer table 90, move it from another unit, and place it on the switching transfer table receiving unit 401. Can be moved to. That is, the transfer table 90 can be easily transferred between the units. Note that the length of the switching first roller unit 430 in the longitudinal direction of the switching transport table receiving unit 401 is such that the transport distance of the transport table 90 on the switching transport table receiving unit 401 is the first U-shaped unit 40 and the second It is set so as to be shorter than the moving distance of the carrier 90 moving on the character unit 60.

  Next, the outline of the production line 1 using the switching unit 400 will be described with reference to FIG. FIG. 13 is a top view showing an outline of a production line using the switching unit of the present embodiment. As described above, the switching unit 400 can be used by switching to the first U-shaped unit 40 or the second U-shaped unit 60, but in the following, the switching unit 400 is used by switching to the second U-shaped unit 60. A case will be described as an example.

  In the production line 1 shown in FIG. 13, a switching unit 400 is used instead of the second U-shaped unit 60 (see FIG. 1). That is, in the production line 1, one end of the second linear unit 50 and the switching unit 400 are detachably connected, and the other end of the switching unit 400 and the third linear unit 70 are detachably connected. .

  When changing from the production line 1 shown in FIG. 1 to the production line 1 shown in FIG. 13, the operator releases the connection between the second linear unit 50 and the third linear unit 70, and the second U-shaped unit 60. (See FIG. 1) is moved out of the production line 1.

Next, the switching unit 400 is moved between the second linear unit 50 and the third linear unit 70, and the switching unit 400 is connected to both the units 50 and 70 using inter-unit joints (not shown). To do.

At this time, the operation is performed so that the first roller portion of the second linear unit 50, the switching first roller portion 430 of the switching unit 400, and the first roller portion of the third linear unit 70 are aligned in a straight line. The person operates a lifting switch (not shown) of the switching cylinder unit 417 to raise and lower the switching carrier base 401 to adjust the height of the switching first roller unit 430.
As described above, the second linear unit 50 and the third linear unit 70 have the same first roller unit as the first roller unit 308 of the first linear unit 30.

  In FIG. 13, similarly to FIG. 1, work positions of workers who perform various work are indicated by W <b> 1 to W <b> 10. At each work position, one work is performed by one worker. That is, in the production line 1 shown in FIG. 1, the front door is manufactured through 10 operations (processes) by 10 workers.

  Here, compared with the production line 1 shown in FIG. 1, the production line 1 shown in FIG. 13 has two work positions and two workers engaged in the work. For this reason, when manufacturing the same product as the manufacturing line 1 shown in FIG. 1 on the manufacturing line 1 shown in FIG. 13, the worker at the work position W6 in FIG. Responsible for work (such as attachment of various parts) performed by the worker in W8.

<First action>
In the production line 1 of the present embodiment, when the rotation unit 20 is rotated to the transfer position (the position of the rotation unit 20 indicated by a two-dot chain line in FIG. 1), the lift switch 203 is turned on as shown in FIG. 10C. It will be in a state and the raising / lowering conveyance stand receiving part 201 will raise to a predetermined raising position. Further, when the operator rotates the rotation unit 20 from the transfer position to the receiving position (the position of the rotation unit 20 indicated by a solid line in FIG. 1), the lift switch 203 is moved when the rotation unit 20 leaves the transfer position. Is set to the OFF state, and the lifting / lowering carriage receiving unit 201 starts to descend to the predetermined lowered position shown in FIG. 10A. That is, the turning of the turning unit 20 from the transfer position to the receiving position and the lowering of the lifting / lowering carriage receiving part 201 to the predetermined lowered position can be performed simultaneously.

  For this reason, when the rotating unit 20 is rotated to the receiving position after the elevating / conveying base receiving part 201 is lowered to the predetermined lowered position, or after the rotating unit 20 is rotated to the receiving position, Compared with the case where the part 201 is lowered to the predetermined lowered position, the time required for the lowering of the lifting and lowering carrier receiving part 201 and the rotation of the rotation unit 20 can be shortened. Therefore, it is possible to suppress a decrease in work efficiency.

  In addition, it is possible to restrict the descending carrier receiving unit 201 from rising to a predetermined ascent position other than the transfer position. For this reason, for example, it is possible to prevent the transporting carrier receiving unit 201 from rising from the receiving position to the predetermined rising position during the rotation of the transfer position and dropping the transporting base 90 beyond the standing drop prevention unit 217. can do.

<Second action>
The production line 1 of the present embodiment includes a first U-shaped unit 40, a second U-shaped unit 60, and a switching unit 400. The switching unit 400 can be used by switching between the first U-shaped unit 40 and the second U-shaped unit 60.

  For this reason, when the amount of products manufactured in the manufacturing line 1 in a day is relatively large, the first U-shaped unit 40 and the second U-shaped unit 60 are used as in the manufacturing line 1 shown in FIG. Parts that are assigned to each worker who increases the length of the conveyance path of the conveyance table 90 (the movement distance of the conveyance table 90 is a distance that can be operated by three people) and assembles various components on the component 4 placed on the conveyance table 90 By increasing the number of workers and increasing the number of workers engaged in assembly work, the production amount can be increased and the production efficiency can be increased.

On the other hand, when the amount of products manufactured on the production line in a day is relatively small, a switching unit is used instead of the first U-shaped unit 40 and the second U-shaped unit 60 as in the manufacturing line 1 shown in FIG. 400 is used (in FIG. 13, the switching unit 400 is used instead of the second U-shaped unit 60). In this way, the conveyance path is shortened (the movement distance of the conveyance table 90 is set to a distance that can be operated by one person), the number of parts assigned to each worker who assembles various parts to the conveyance object is increased, and the assembling work is performed. By reducing the number of workers engaged in the manufacturing, manufacturing costs can be reduced and production efficiency can be increased.
As described above, the production efficiency can be increased according to the production amount of the product.

<Third action>
In the production line 1 of the present embodiment, as shown in FIG. 7A, the tip ends of the pair of roller portions 125, 125 of the transport table holding unit 120 at the protruding position move to the holding position in the transport table collection unit 10 by their own weight. The movement from the holding position is restricted by sandwiching both ends of the transport table 90.

Further, as shown in FIG. 7B, when the foot switch 118 (see FIG. 6) is operated (stepped on) and turned from the off state to the on state, the tip portions of the pair of roller portions 125, 125 of the transport table holding unit 120 However, it moves from the protruding position to a retracted position where the movement of the transport table 90 is not restricted. The roller 128 in the one roller portion 125 on the rotation unit 20 side in the retracted position rotates in contact with the back surface of the transport table 90 that moves to the rotation unit 20. For this reason, the conveyance stand 90 can be easily moved to the rotation unit 20 by its own weight. Further, the roller 128 of the other roller unit 125 rotates in contact with the back surface of the subsequent transport table 90. For this reason, the subsequent conveyance stand 90 can be easily moved to the holding position by its own weight.
As described above, since the transfer table holding unit 120 holds the transfer table 90, it is possible to easily move the transfer table 90 again after stopping the movement of the transfer table 90. The decrease can be suppressed.

<Fourth action>
As shown in FIG. 8, the production line 1 of the present embodiment has a roller side fall prevention portion 236. After the conveyance table 90 moves to the rotation unit 20, the inner end 239b of the fall prevention unit main body 239 in the roller side fall prevention unit 236 is released from the pressing of the lower end of the conveyance table 90 as shown in FIG. 11C. Rotate from the retracted position to the fall prevention position.

  When the operator rotates the rotation unit 20 supporting the transfer table 90 from the state shown in FIG. 11C to the transfer position (the position of the rotation unit 20 indicated by a two-dot chain line in FIG. 1), the rotation is performed. When the transport table 90 moves in the direction of arrow E due to the centrifugal force, the lower end of the transport table 90 comes into contact with the inner end 239b at the fall prevention position. At this time, since the lower end portion of the fall prevention portion main body 239 on the collection side end portion 239a side is in contact with the bottom surface portion 238 of the roller portion main body 234, the roller side fall prevention portion 236 is pushed by the lower end portion of the transport base 90. However, it does not rotate and restricts the movement of the carrier 90 in the direction of arrow E. As a result, it is possible to suppress the conveyance table 90 from falling from the rotation unit 20 while the rotation unit 20 is rotating.

  Further, when the transport table 90 is moved to the rotating unit 20, the inner end 239b of the fall prevention unit main body 239 comes into contact with the lower end of the moving transport table 90 and moves downward as shown in FIG. 11B. It is pushed and moves from the fall prevention position to the retracted position. For this reason, the roller side fall prevention part 236 does not hinder the movement of the transport table 90 to the rotation unit 20. Therefore, a decrease in production efficiency can be suppressed.

<Modification>
In the above, the production line concerning one embodiment of the present invention was explained including the operation effect. However, the production line of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention described in the claims.

  In the present embodiment, the aspect in which the production line 1 manufactures the front door of the pachislot has been described. However, the product manufactured by the manufacturing line 1 is not limited to this, and may be any product that is manufactured through a process of assembling various components on a component member mounted on a conveyance table that moves along a predetermined path. The manufactured product manufactured by the manufacturing line 1 may be, for example, a pachinko game board or an accessory.

  In the present embodiment, the height of the transport table 90 supported by the transport table recovery unit 10 (the distance between the lower end portion of the transport table 90 and the installation surface of the production line 1) is the first height, and is at the lowered position. When the height of the carrier 90 when placed on the lift carrier holder 201 is the third height, the third height is lower (smaller) than the first height. That is, the rotation unit 20 in which the lifting / lowering carriage receiving unit 201 is in the lowered position supports the carriage 90 at the third height lower than the first height. However, the present invention is not limited to this, and the rotation unit 20 in which the lifting / lowering carrier receiving part 201 is in the lowered position may support the carrier 90 at a height equal to the first height. In this case, when the conveyance table 90 does not move from the conveyance table collection unit 10 to the rotation unit 20 due to its own weight, the operator pushes and slides the conveyance table 90 to move the conveyance table 90 from the conveyance table collection unit 10 to the rotation unit. What is necessary is just to move to 20. At this time, since the operator does not need to lift the transfer table 90, the transfer table 90 can be easily moved from the transfer table collection unit 10 to the turning unit 20.

  Moreover, in this embodiment, the raising / lowering 1st roller part 232 of the raising / lowering conveyance stand receiving part 201 in a raise position exists in the height substantially equal to the 1st roller part 308 (refer FIG. 3) of the 1st linear unit 30. FIG. Therefore, the height of the transport table 90 supported by the first linear unit 30 (the distance between the lower end of the transport table 90 and the installation surface of the production line 1) is the second height, and the lifting transport table is received at the raised position. When the height of the carrier 90 when placed on the unit 201 is the fourth height, the second height and the fourth height are substantially equal. That is, the rotation unit 20 in which the lifting / lowering carriage receiving part 201 is in the raised position has described the aspect in which the carriage 90 is supported at the fourth height that is substantially equal to the second height. However, the present invention is not limited to this, and the rotation unit 20 in which the lifting / lowering carrier receiving part 201 is in the raised position may support the carrier 90 at a fourth height higher than the second height. In this case, the operator can easily move the transport table 90 from the rotation unit 20 to the first linear unit 30 without lifting the transport table 90.

  In the present embodiment, the first height (the height of the conveyance table 90 supported by the conveyance table collection unit 10) is set to the second height (the conveyance table 90 supported by the first linear unit 30). The aspect set lower than (height) was described. However, instead of this, the second height may be set lower than the first height.

  Further, in the present embodiment, the mode in which the switching unit 400 includes the switching cylinder unit 417 that moves the switching transport base receiving unit 401 up and down has been described. However, the switch carrier receiving part 401 is arranged in advance at a position where the height of the switching first roller part 430 is equal to the height of the first roller part of the unit to which the switching unit 400 is connected. In such a case, the installation of the switching cylinder portion 417 may be omitted.

  Moreover, you may attach a wheel to the short leg part of the 1st U-shaped unit 40 and the 2nd U-shaped unit 60, and the lower part of a long leg part. In this case, when the switching unit 400 is used instead of the first U-shaped unit 40 and the second U-shaped unit 60, the operator can easily use the first U-shaped unit 40 and the second U-shaped unit 60. Can be moved out of the production line 1.

  Further, in the present embodiment, the aspect in which the air cylinder is employed as the cylinder part 121, the lift cylinder part 224, and the switching cylinder part 417 has been described. However, the present invention is not limited to this, and other devices that can move up and down the other transport table receiving unit 101, the lift transport table receiving unit 201, and the switching transport table receiving unit 401 can be appropriately employed. For example, a hydraulic cylinder may be employed instead of the air cylinder.

  Further, the first linear unit 30, the first U-shaped unit 40, the second linear unit 50, the second U-shaped unit 60, the third linear unit 70, and the third U-shaped unit 80 are conveyed in this order. In the production line 1 of the present embodiment where the table 90 is transferred, the transfer table 90 moves in the transfer direction by its own weight on these units 30, 40, 50, 60, 70 and 80, like the transfer table collection unit 10. You may make it incline so that.

  DESCRIPTION OF SYMBOLS 1 ... Manufacturing line, 2 ... Elector pipe, 3 ... Joint, 4 ... Constituent member, 10 ... Conveyance base collection unit, 10A ... Downstream conveyance base collection unit, 10B ... Upstream conveyance base collection unit, 20 ... Turning unit DESCRIPTION OF SYMBOLS 21 ... Support shaft, 30 ... 1st linear unit, 40 ... 1st U-shaped unit, 50 ... 2nd linear unit, 60 ... 2nd U-shaped unit, 70 ... 3rd linear unit, 80 ... 1st 3 ... U-shaped unit, 90 ... transport table, 101 ... transport table receiving unit, 108 ... first roller unit, 112 ... second roller unit, 113 ... third roller unit, 118 ... foot switch, 120 ... transport table holding unit 121 ... Cylinder part, 125 ... Roller part, 201 ... Elevating conveyance base receiving part, 202 ... Elevating support part, 203 ... Elevating switch, 209 ... Wheel, 220 ... Vertical low , 224 ... Elevating cylinder part, 232 ... Elevating first roller part, 236 ... Roller side fall prevention part, 239 ... Fall prevention part body, 239b ... Inner end part, 243 ... Elevating second roller part, 244 ... Elevating third part Roller unit 301 ... Conveying table receiving unit 308 ... First roller unit 312 ... Second roller unit 313 ... Third roller unit 400 ... Switching unit 401 ... Switching conveying table receiving unit 402 ... Elevating support unit 409 ... Wheel, 414 ... Vertical roller part, 417 ... Switching cylinder part, 430 ... Switching first roller part, 434 ... Switching second roller part, 435 ... Switching third roller part, 436 ... Switching fourth roller part, 437 ... Switching fifth roller part

Claims (1)

In the production line that assembles various parts to the components mounted on the conveyor that moves along a predetermined path,
A first support part for movably supporting the plurality of transfer tables;
A second support part for movably supporting the transport table;
A receiving position that is disposed between the first support part and the second support part and that receives the transfer table from the first support part, and a position that passes the received transfer table to the second support part A delivery section that is movable between a delivery position that is
The delivery unit that is provided in the first support unit and has received the transport table from the first support unit moves to the transfer position, passes the transport table to the second support unit, and returns to the reception position. And a movement restricting unit that restricts movement of the subsequent transport table from a predetermined position,
The first support part is inclined so that the carrier can move to the delivery part side by its own weight,
The movement restriction unit is
A projecting position that protrudes along a direction intersecting the transport direction, sandwiches both ends of the transport table in the transport direction at the predetermined position, and restricts the transport table from moving from the predetermined position; and It is possible to move to a retreat position that does not restrict movement,
When the conveyance table moves from the first support unit to the delivery unit, the conveyance table includes a movement auxiliary unit that contacts the conveyance table at the retracted position and assists the movement of the conveyance table. Production line.

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