JP5973238B2 - Horizontal bar supply device in rebar net manufacturing equipment - Google Patents

Description

  The present invention relates to a horizontal bar supplying device in a reinforcing bar net manufacturing apparatus for efficiently manufacturing a reinforcing bar net used as a reinforcing material such as a concrete pavement or a concrete slab of a building.

  2. Description of the Related Art A rebar network manufacturing apparatus is known in which a horizontal bar is supplied on a vertical bar every time one pitch of vertical bars arranged in parallel is sent, and a cross section of the two is spot welded to manufacture a reinforcing bar network (for example, Patent Document 1). ).

  A conventional reinforcing bar net manufacturing apparatus is a horizontal bar supply device, in which a large number of horizontal bars are aligned in the horizontal direction to flow down in a diagonally downward gap, and a horizontal bar is transferred downstream from the lower end of the chute part one by one. A feed adjustment section that is discharged to the bottom, a cylinder at the lower end of the delivery section, a guide member that is attached to the lower side of the cylinder and swings up and down, and a receiving member that positions and holds the horizontal bar between the electrodes of the spot welder And. The cylinder defines the timing for moving the horizontal stripe from the delivery section to the guide member side, and the guide member guides the horizontal stripe to a predetermined position between the upper and lower electrodes of the spot welder and stops it via the receiving member. Therefore, when the upper electrode of the spot welder is lowered, the guide member swings downward to drop the horizontal stripe on the vertical stripe, and the horizontal stripe can be spot-welded on the vertical stripe. That is, the horizontal stripe stop position by the guide member and the receiving member corresponds to the welding position by the spot welder.

JP 2000-288670 A

  When such a conventional technique is used, the chute part causes the horizontal horizontal stripes to flow down in the diagonally downward gap, so that if the horizontal stripes are slightly bent or twisted, the horizontal stripes are clogged and smooth operation cannot be performed. In addition, there is a problem that it is difficult to improve the manufacturing efficiency by shortening the operation cycle time because the moving distance of the horizontal stripe from the feed adjusting unit to the receiving member through the cylinder and the guide member is long.

  Accordingly, in view of the problems of the prior art, an object of the present invention is to provide a rebar net manufacturing apparatus capable of smoothing and speeding up the entire operation by combining a chain conveyor, a guide member, a holding member, and a regulating material. An object of the present invention is to provide a lateral muscle supply device.

  In order to achieve the above object, the present invention comprises a chain conveyor that is installed obliquely downward above a reinforcing bar network, and carries horizontal bars one by one, a diagonally downward guide material that is fixed to the front end of the chain conveyor, The guide comprises: a holding member that is fixed in an adjustable manner and that positions and holds the horizontal stripe at a predetermined position between the electrodes of the spot welder; and a downward regulating member that moves up and down integrally with the upper electrode of the spot welder. The material guides the horizontal line from the chain conveyor toward the holding member, and the regulating material crosses the guide material when lowered and restrains the horizontal line on the guide material to stand by, and when it rises, the crossing with the guide material is released. Then, the gist of the invention is to release the horizontal streaks on the guide member and to fall down toward the holding member.

  The guide material can be formed in a horizontal plane below the tip, and the regulating material can be electrically insulated and assembled to the electrode holder on the upper side of the spot welder.

  The holding member may be provided with a magnet that holds and holds the horizontal stripes from the guide material on the vertical plane, and holds the horizontal stripes from the guide material above the welded horizontal stripes on the vertical bars via the magnet. May be.

  According to the configuration of the invention, the chain conveyor intermittently carries the horizontal stripes one by one above the vertical stripe, and the horizontal stripes from the chain conveyor are guided toward the holding member via the guide member, and the holding member By this, it is positioned and held at a predetermined position between the electrodes of the spot welder. Therefore, by lowering the upper electrode of the spot welder, the horizontal stripes held via the holding member can be pushed down on the vertical stripes for spot welding.

  However, the movement of the horizontal streaks on the guide material is restricted by a restricting material that moves up and down integrally with the upper electrode of the spot welder. When the restricting material is lowered, it is restrained on the guide material and waits, and the restricting material rises. Then, the restraint is released and moves toward the holding member. That is, the upper electrode of the spot welder is lowered to weld the horizontal stripes held between the electrodes to the vertical stripes, and at the same time, the chain conveyor is driven by one pitch and the next horizontal stripe is transferred onto the guide material and regulated. When the restricting material rises together with the upper electrode due to the completion of welding, the transverse material on standby is released on the guide material and moved between the electrodes of the spot welder. The vertical streak is conveyed by one pitch to prepare for the welding of the next lateral streak, and the same operation is repeated thereafter.

  It should be noted that the conveying time for one pitch of the horizontal stripe by the chain conveyor can be made shorter than the welding time of the spot welder, and from the front end of the chain conveyor to the standby position on the guide material by the regulating material, Each moving time of the horizontal stripe from the standby position to the holding position by the holding member is very short. Therefore, the overall operation cycle time can be shortened to substantially the same as the total time of the welding time of the spot welder and the conveying time for one pitch of the vertical stripe, and the overall operation speed is increased. Smoothing can be realized.

  By forming the lower side of the tip portion in a horizontal plane, the guide material can be guided stably and quickly with the tip sufficiently close to the vertical stripe and the horizontal stripe directed toward the holding member.

  In order to raise and lower the restricting material integrally with the upper electrode of the spot welder, it is preferable that the restricting material is electrically insulated and assembled to the upper electrode holder. This is because it is possible to prevent the stray current of the welding current due to the restricting material and to easily achieve the necessary and sufficient mounting strength of the restricting material by minimizing the required constituent members.

  The holding member can hold the horizontal streak from the guide material on the vertical surface via the magnet arranged in the vertical direction and correctly hold it in a predetermined position. It is assumed that the magnet's attractive force is sufficiently larger than the weight of the horizontal stripe.

  The holding member holds the horizontal bar from the guide material above the welded horizontal bar on the vertical bar via a gap, so that even if the vertical bar is conveyed by one pitch, it is next welded while being held by the holding member. The horizontal stripes to be touched do not touch the vertical stripes or the welded horizontal stripes on the vertical stripes, and there is no risk of inadvertently dropping off or being displaced from the holding member.

Overall configuration side view Front view of main components 1 is an enlarged view of the main part of FIG. Configuration explanatory diagram of holding member Overall operation diagram Overall configuration diagram

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The horizontal bar supply device in the reinforcing bar manufacturing apparatus is mainly composed of a chain conveyor 10 for transferring the horizontal bars W1, W1,... One by one, a guide member 21, a holding member 30, and a regulating member 22 (FIGS. 1 and 2). ).

  The guide material 21 is fixed obliquely downward to the front end of the chain conveyor 10. The holding member 30 is assembled to a frame (not shown) for the spot welder 50 together with the guide 41 for the vertical bar W2. In the spot welder 50, the fixed lower electrode 51 and the upper electrode 52 that can be raised and lowered face each other in a straight line, and the regulating member 22 is assembled downward with respect to the holder 52a for the upper electrode 52. ing. A plurality of sets of spot welders 50 are mounted on a common horizontal rail (not shown) arranged in a direction perpendicular to the paper surface of FIG. 1 and in a horizontal direction of FIG. In addition, for example, four sets of chain conveyors 10 are arranged so as to be positioned in a horizontal direction via a common drive shaft, and are positioned between two sets of spot welders 50 and 50 arranged at appropriate intervals. Place and use as such.

  The lower electrode 51 of the spot welder 50 is supported upward via a holder 51a. The upper electrode 52 is supported downward through a holder 52a, and the holder 52a is connected to a lifting cylinder 52b. Note that a flexible cable (not shown) is connected to the holders 51a and 52a, and a cooling water hose (not shown) is connected to the electrodes 51 and 52 for water cooling. Therefore, the spot welder 50 lowers the upper electrode 52 onto the lower electrode 51 through the cylinder 52b and applies a welding current to the horizontal weld W1 positioned between the electrodes 51, 52, Spot welding can be performed at the intersection of the muscle W2.

  The transverse stripe W1 is carried in common between the electrodes 51, 52 of the plurality of spot welders 50, 50... Via the chain conveyors 10, 10. Further, the vertical stripes W2, W2,... Are positioned immediately above the lower electrode 51 while being inserted and guided into the guide groove 41a of the guide 41 for each spot welding machine 50 via a common conveying device (not shown). Are transported simultaneously one pitch at a time (in the direction of arrow K1 in FIG. 1).

  The chain conveyor 10 is configured by winding a transport chain 11 around front and rear sprockets 12 and 12 (FIGS. 1 and 3). The chain 11 is provided with hook-like attachments 11a, 11a,... For carrying the horizontal stripe W1 on the same pitch, and the front and rear sprockets 12, 12 are attached to the front and rear ends of the support plate 13, respectively. Yes. However, in FIGS. 1 and 3, only the sprocket 12 at the front end of the support plate 13 obliquely downward is illustrated, and the sprocket 12 at the front end is a long hole 13 a of the support plate 13 for adjusting the tension of the chain 11. It can be moved to the range. Therefore, the chain conveyors 10, 10... Transport the horizontal stripes W1, W1... On the attachments 11a, 11a... One by one by rotating the sprockets 12, 12. (In the direction of arrows K2 in FIGS. 1 and 3).

  The guide member 21 attached to the front end of the chain conveyor 10 is a narrow plate member that is fixed to the front end of the support plate 13 of the chain conveyor 10, and the tip of the guide member 21 is formed in a horizontal plane on the lower side. Yes. The guide member 21 is disposed at an appropriate angle and position so that the transverse stripe W1 from the chain conveyor 10 can be guided between the electrodes 51 and 52 of the spot welder 50. However, the horizontal stripe W1 on each attachment 11a of the chain conveyor 10 is smoothly transferred onto the guide material 21 when the attachment 11a rotates around the sprocket 12 at the front end of the chain conveyor 10, and then the guide material 21 It falls along the upper edge toward the tip of the guide material 21 (in the direction of arrow K3 in FIG. 3).

  The holding member 30 is screwed to the frame of the spot welder 50 via brackets 35a, 35b,... 35d (FIGS. 1 and 2). The bracket 35a is formed in an L-shape having fork-shaped sides, and the fixing position of the holding member 30 can be adjusted in the vertical direction and the horizontal direction in FIG.

  The holding member 30 is configured by screwing pressing plates 32 and 33 to the left and right of the downward intermediate plate 31 and sandwiching a magnet 34 between the pressing plates 32 and 33 (FIGS. 2 and 4). However, FIGS. 4A and 4B are an exploded perspective view and an enlarged view of the attachment state of the holding member 30, respectively.

  The magnet 34 is a vertically long rectangular parallelepiped flat neodymium magnet, and the magnetization direction is double-sided magnetization in the plate thickness direction. The thickness of the magnet 34 is slightly larger than the thickness of the intermediate plate 31, and the size of the magnet 34 is formed in front of the intermediate plate 31 so as to be substantially concealed by the holding plates 32 and 33. However, the intermediate plate 31 is made of non-magnetic stainless steel together with one presser plate 33, and the other presser plate 32 is made of magnetic soft steel. Further, the longitudinal end surface of the presser plate 32 on the magnet 34 side is hardened to a sufficient hardness to protect the magnet 34.

  The holding member 30 can position and hold the transverse stripe W1 guided obliquely downward through the guide member 21 at a predetermined position between the electrodes 51 and 52 of the spot welder 50 (FIGS. 3 and 4B). ) Each dash-dot line). However, the center of the attraction force by the magnet 34 at this time is, for example, the position of the arrow K4 in FIG. 4B corresponding to the middle in the longitudinal direction of the magnet 34. Therefore, the horizontal stripe W1 from the guide material 21 is It is adsorbed and held at a position where a gap d is formed above the welded transverse line W1 (solid lines in FIGS. 3 and 4B) on the line W2.

  The regulating member 22 is assembled to the holder 52a for the upper electrode 52 of the spot welder 50 through an insulating collar 22a and a bracket 22b (FIGS. 1 and 3). The insulating collar 22a has an axial slit and can be reduced in diameter on the holder 52a via a split-type bracket 22b. The restricting member 22 suspended from the bracket 22b moves up and down integrally with the upper electrode 52. When the electrode 52 is lowered, the restricting member 22 crosses the guide member 21 and falls on the upper edge of the guide member 21. W1 can be constrained to wait on the guide material 21 (two-dot chain line in FIG. 3), and when the electrode 52 is raised (solid line in FIG. 3), the crossing with the guide material 21 is released and the guide material 21 is released. The horizontal streak W1 waiting on the top can be released and dropped down toward the holding member 30 between the electrodes 51 and 52 of the spot welder 50.

  The operation of the horizontal bar supply device in the reinforcing bar manufacturing apparatus is as shown in FIG. 5, for example.

  Now, as shown in FIG. 3, the upper electrode 52 of the spot welder 50 is raised, and the chain conveyor 10 is stopped with the transverse stripe W1 positioned at the front end via the attachment 11a. Between the electrodes 51 and 52, there is no welded horizontal stripe W1 on the stopped vertical stripe W2, and only the horizontal stripe W1 held by the holding member 30 is present (time t in FIG. 5). <To, hereinafter referred to simply as (t <to)).

  Accordingly, the upper electrode 52 of the spot welder 50 is lowered (t = to), the horizontal stripe W1 held by the holding member 30 is pushed down and welded onto the vertical stripe W2, and when the chain conveyor 10 is driven, the chain conveyor is driven. 10 is transferred onto the guide member 21 and is restrained on the guide member 21 by the restricting member 22 descending together with the electrode 52 (t = to + Ta (however, Ta is a slight time delay)). Thereafter, when the driving time T1 for one pitch of the chain conveyor 10 has elapsed (t = to + T1), the next transverse stripe W1 is located at the front end of the chain conveyor 10, and the chain conveyor 10 is stopped.

  Subsequently, when the welding time T2> T1 of the spot welder 50 elapses (t = t1 = to + T2), the welding current is stopped and the upper electrode 52 is raised, and the vertical stripe W2 is conveyed by one pitch. At this time, since the regulating member 22 also rises as the electrode 52 rises, the horizontal bar W1 waiting on the guide member 21 falls toward the holding member 30 and is held by the holding member 30. Therefore, when the conveyance time T3 for one pitch of the vertical stripe W2 elapses (t = t2 = t1 + T3), the state returns to the original time t <to, so that the next operation cycle is performed after a slight margin time Td. The operation is resumed (t = t3 = t2 + Td), and thereafter the same operation may be repeated.

  In FIG. 5, the total operation cycle time T = T2 + T3 + Td (where T1 <T2). Therefore, if the allowance time Td≈0, the operation cycle time T≈T2 + T3 can be shortened. 5, the W1 front end position, the W1 standby position, and the W1 holding position are respectively set to the standby position on the guide material 21 by the regulating material 22 when the horizontal stripe W1 is carried into the front end position of the chain conveyor 10. This shows the time when the horizontal stripe W1 falls from the tip of the guide member 21 and is attracted to the holding position by the holding member 30 when it is restrained.

  FIG. 6 shows an example of a combination form of the chain conveyors 10, 10... With respect to the spot welders 50, 50. The vertical bars W2, W2... Corresponding to each spot welder 50 are arranged for each pitch p2, and these vertical bars W2, W2... ... Are introduced to the spot welders 50, 50... In the direction of arrow B one by one in order and spot welded onto the vertical bars W 2, W 2. Can be continuously formed in the direction of arrow C and discharged. However, the horizontal stripes W1, W1,... Are supplied one by one to the attachments 11a, 11a,.

  For example, 20 sets of spot welders 50, 50... Are combined with 4 sets of chain conveyors 10, 10..., The guide material 21 is provided at the front end of each chain conveyor 10, and the regulating material 22 and the holding member 30 are It is sufficient to provide them corresponding to every other 10 sets of spot welders 50, 50. However, the spot welders 50, 50... May have an arbitrary number of sets of less than 20 sets or more than 20 sets. Further, in FIG. 6, when the transverse bar W1 is divided into two so as to correspond to the two sets of chain conveyors 10 and 10 on the left side and the right side, the two reinforcing bars N and N of 1/2 width are paralleled. Can be made.

  In the above description, instead of assembling the regulating member 22 to the holder 52a for the electrode 52 via the insulating collar 22a, for example, the regulating member 22 may be directly assembled to the holder 52a via the bracket 22b of insulating material. It may be insulated and attached. Moreover, you may comprise the control material 22 itself with an insulating material.

  The present invention can be applied to a wide range of applications for high-speed production of flat reinforcing bar nets of any size.

W1 ... Horizontal bar W2 ... Vertical bar N ... Reinforcing bar network 10 ... Chain conveyor 21 ... Guide material 22 ... Regulating material 30 ... Holding member 34 ... Magnet 50 ... Spot welder 51, 52 ... Electrode 52a ... Holder

Patent applicant

Claims (5)

It is installed diagonally downward above the reinforcing bar net , and the chain conveyor that carries the horizontal bars one by one, the diagonally downward guide material that is fixed to the front end of the chain conveyor, and the position adjustable are fixed . A holding member that is positioned and held at a predetermined position between the electrodes, and a downward regulating member that moves up and down integrally with the upper electrode of the spot welder, and the guide member includes the horizontal stripe from the chain conveyor. The guide member is guided toward the holding member, and when the lowering member is lowered, it intersects with the guide member and restrains the horizontal stripe on the guide member to stand by, and when it is raised , the crossing with the guide member is released, and the guide member is released. lateral stripes supply device in the production apparatus rebar network characterized by isosamples release the lateral stripes waiting above to fall toward the holding member.   2. The horizontal bar supply device in a rebar net manufacturing apparatus according to claim 1, wherein the guide member is formed in a horizontal plane below the tip.   The said reinforcing material is electrically insulated and assembled | attached to the holder for the electrodes of the upper side of a spot welder, The horizontal bar supply apparatus in the manufacturing apparatus of the reinforcing bar net | network of Claim 1 or Claim 2 characterized by the above-mentioned.   The said holding member is provided with the magnet which adsorb | sucks and hold | maintains the horizontal stripe from the said guide material to a vertical surface, The horizontal stripe supply apparatus in the manufacturing apparatus of the reinforcing bar net | network in any one of Claim 1 thru | or 3 characterized by the above-mentioned.   5. The horizontal bar supply device in the reinforcing bar net manufacturing apparatus according to claim 4, wherein the holding member holds the horizontal bar from the guide member above the welded horizontal bar on the vertical bar via the magnet.

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