JP5320580B2 - Screw-driven transfer device - Google Patents

Description

  The present invention relates to a screw-driven transfer device for driving and propelling the transfer carriage by engaging a follower roller on the transfer carriage side with a screw shaft for driving the transfer carriage on the travel path side.

A screw-driven conveying device, that is, a rotationally driven screw shaft is disposed along the traveling path of the conveying carriage, and the conveying carriage is provided with a driven roller that engages with the screw shaft, and by the rotational driving of the screw shaft A screw-driven transfer device configured to propel a transfer carriage is conventionally known as described in Patent Document 1 and the like. Thus, in this type of transport device, when the travel path length of the transport carriage is long, a plurality of screw shafts are arranged in series concentrically with the phases of the spiral blades of each screw shaft aligned, It is necessary to interlock and connect so as to rotate in the same direction at the same speed. However, between the screw shafts in series, bearings at both ends of the screw shaft and transmission means between the screw shafts must be disposed. For this reason, a gap portion having a considerable length is required between the screw shafts. Regardless of the presence of this gap, it is possible to smoothly transfer the follower roller on the transport carriage side from the upper screw shaft to the lower screw shaft to ensure continuous running without interrupting the travel of the transport carriage. It must be configured so that it can.

  Conventionally conceivable configurations for the above problems include a pair of front and rear driven rollers that are engaged with the same screw shaft at intervals longer than the length of the gap between the screw shafts on the conveying carriage side, and a front driven roller. While driving in the space between the screw shafts, the conveyance carriage is driven and propelled through the rear driven roller. However, when the transport carriage is driven at a constant speed over the entire area of the transport carriage drive path constituted by all the screw shafts in series, in other words, when the feed pitch of each screw shaft is the same, there is no problem with the above configuration. However, when trying to adopt a configuration that changes the feed pitch of the screw shaft in a specific region, that is, a configuration that can change the traveling speed of the transport carriage in the specific region while rotationally driving all the screw shafts at a constant speed. The pair of front and rear driven rollers are engaged between the two front and rear regions having different feed pitches, and the transport carriage cannot be transferred between the regions having different feed pitches. That is, in a configuration that uses a pair of front and rear driven rollers that engage with the same screw shaft, a configuration that changes the feed pitch of the screw shaft in a specific region cannot be adopted.

An object of the present invention is to provide a screw-driven conveying device that can solve the conventional problems as described above, and the screw-driven conveying device according to claim 1 is an embodiment described later. .., A plurality of screw shafts 1A, 1B, 1C,... That are rotationally driven are arranged concentrically along the travel path of the transport carriage 2, and the transport carriage 2 includes the screw shaft. 1A, 1B, 1C... In a screw-driven transfer device that is provided with a driven roller 14 that engages with the screw shafts 1A, 1B, 1C. , each screw shaft 1A, 1B, the gap portion 5 is arranged between 1C ......, one of the screw shafts 1A adjacent to the air gap 5 between the screw shaft 1B, 1C next side of the ...... end, the one of the screw shafts 1A, 1B, 1C ...... the interlocking rotary driven and the feed pitch of the one screw shaft 1A, 1B, feed pitch 1C ...... same short auxiliary screw shaft 6A and, 6B ...... are arranged in parallel form, the transport vehicle 2, and the driven roller 14, an auxiliary screw shaft 6A, and the auxiliary driven roller 16 that engages the 6B ......, The driven roller 14 is provided with a position shifted in the axial direction of the screw shaft. The distance D between the driven roller 14 and the auxiliary driven roller 16 in the axial direction of the screw shaft and the length of the auxiliary screw shafts 6A, 6B. The auxiliary driven roller 16 is engaged with the auxiliary screw shafts 6A, 6B,. It has become a set configured to have.

  In carrying out the present invention having the above-described configuration, specifically, as described in claim 2, the end portions adjacent to the inter-screw shaft gaps 5 of the screw shafts 1A, 1B, 1C,. The shafts 6A, 6B... Can be interlocked and connected to each other by the two transmission means 9 and 10 that relay the end portion on the gap portion 5 side between the screw shafts.

  Further, in the configuration of the present invention, in the region other than the transfer regions B1 and B2 including one auxiliary screw shaft 6A, 6B... And one screw shaft gap 5, one driven roller 14 is screw shaft 1A, 1B. , 1C..., So that the feed pitch P1 or P2 of the screw shafts 1A, 1B, 1C... Does not change in the transfer areas B1, B2. The front and rear regions A1, A2,... Have different feed pitches of the screw shafts 1A, 1B, 1C,... At locations other than the transfer regions B1, B2, and the transfer regions B1, The feed pitches P1, P2 of the screw shafts 1A, 1B, 1C... At B2 are determined by the scoring between the driven roller 14 and the auxiliary driven roller 16. It can be set to an integral submultiple of the distance D of Yushafuto axis.

  According to the configuration of the first aspect, a short auxiliary screw shaft is additionally provided in parallel for each gap between the screw shafts on the conveyance path side, and the position is shifted separately from the original driven roller on the conveyance carriage side. While it is a simple configuration that only adds one auxiliary driven roller, while the driven roller moves through the space between the screw shafts, the auxiliary driven roller and the auxiliary screw shaft can drive and propel the conveyance carriage, The carriage can be continuously driven regardless of the presence of the gap between the screw shafts. In addition, in a region other than the transfer region including one auxiliary driven roller and one screw shaft gap, only one driven roller is engaged with the screw shaft. It is also possible to change the traveling speed of the transport carriage in the traveling path by arranging the boundary between the two areas before and after the screw shaft feed pitch is different. Of course, in this case, the screw shaft feed pitch (conveyance speed of the transport carriage) in the transfer region is such that the driven roller and the auxiliary driven roller can be engaged with the screw shaft and the auxiliary screw shaft before and after the gap without any problem. Must be set.

  Further, according to the configuration of the second aspect, the auxiliary screw shaft is utilized as a relay intermediate shaft for interlocking the screw shafts, so that all the screw shafts and the auxiliary screw shafts can be transmitted with a relatively simple configuration. Can be linked together.

  Furthermore, according to the configuration of claim 3, in the configuration in which a plurality of transfer areas including one auxiliary driven roller and one gap between the screw shafts are provided, it is necessary to make the feed pitch in all the transfer areas the same. If it is set to 1 / integer of the distance in the axial direction of the screw shaft between the driven roller and the auxiliary driven roller, the feed pitch in the transfer area can be changed as necessary. Therefore, a plurality of areas where the traveling speeds of the transport carriages in the traveling route are different from each other are combined with the arrangement of the boundary between the two areas before and after the screw shaft feed pitch is different in a place other than the transfer area. Can be set arbitrarily.

  1 and 2 are diagrams showing a part of the conveying device, and the conveying carriage 2 driven and driven by the screw shafts 1A, 1B, 1C... Is one of a pair of left and right guide rails 3a and 3b. A pair of front and rear wheels 4a that roll on the guide rail 3a and a pair of front and rear wheels 4b that roll on the other guide rail 3b and sandwich the guide rail 3b from both left and right sides are provided. . The screw shafts 1A, 1B, 1C,... Are arranged in a concentric series in parallel with the guide rails 3a, 3b with the gap 5 therebetween at an intermediate position between the pair of left and right guide rails 3a, 3b. . The screw shafts 1A, 1B, 1C... Are shorter than the screw shafts 1A, 1B, 1C... At the lateral side positions of the ends adjacent to the inter-screw shaft gap 5 at the ends in the same direction. Auxiliary screw shafts 6A, 6B,... That are sufficiently longer than the length of the inter-screw shaft gap 5 and have the same length are arranged in parallel. The ends of the screw shafts 1A, 1B, 1C... And the auxiliary screw shafts 6A, 6B... That are adjacent to each other adjacent to the inter-screw shaft gap 5 are aligned with respect to the axial direction of the screw shaft.

  As shown in FIGS. 4 and 5, the screw shafts 1A, 1B, 1C... And the auxiliary screw shafts 6A, 6B... Are bearings 7 at the protruding shaft portions 1a, 1b and 6a, 6b protruding from both ends. , 8 and the projecting shaft portions 1a, 1b of the screw shafts 1A, 1B, 1C... Adjacent to each other in the space 5 between the screw shafts and the space between the screw shafts of the auxiliary screw shafts 6A, 6B. The protruding shaft portion 6a protruding into the portion 5 is the tooth rings 9a, 9b and the tooth rings 10a, 10b attached to the protruding shaft portions 1a, 1b, 6a, and between the tooth rings 9a, 9b and the tooth ring 10a, Linked to each other by transmission means 9 and 10 composed of chains 9c and 10c stretched between 10b and positioned at one end of the travel route of the transport carriage 2. As shown in FIGS. 1 to 3, the screw shaft 1A is linked to a motor 12 with a speed reducer via a transmission means 11 using tooth rings 11a and 11b and a chain 11c in the same manner as the transmission means 9 and 10. Has been. Thus, by rotating and driving the screw shaft 1A by the motor 12 with a reduction gear, all the screw shafts 1A, 1B, 1C... And the auxiliary screw shafts 6A, 6B. Can be rotated. Each of the inter-screw shaft gaps 5 has bearings 7 and 8 for supporting one end of each of the screw shafts 1A, 1B, 1C... And the auxiliary screw shafts 6A, 6B. It is used as.

  The drive system of the screw shafts 1A, 1B, 1C... And the auxiliary screw shafts 6A, 6B. For example, one of the screw shafts 1B, 1C,... Or the auxiliary screw shafts 6A, 6B,... Linked with the screw shafts 1A, 1B, 1C,. Can be configured to be driven by a motor with a reduction gear. Further, although the transmission means 9 to 11 are shown as using the chain, transmission means using a gear or the like can also be used.

  The conveying carriage 2 is fitted between a driven roller 14 fitted between the spiral blades 13a, 13b of the screw shafts 1A, 1B, 1C... And between the spiral blades 15a, 15b of the auxiliary screw shafts 6A, 6B. An auxiliary driven roller 16 is provided. As shown in FIG. 5, the driven roller 14 and the auxiliary driven roller 16 are arranged in parallel with the auxiliary screw shafts 6A, 6B,... Of the screw shafts 1A, 1B, 1C,. When the auxiliary driven roller 16 is fitted between the spiral blades 13a and 13b on the side end, the auxiliary driven roller 16 is connected to the end of the auxiliary screw shaft 6A, 6B. The length of the inter-screw shaft gap 5 is shorter than the length of the auxiliary screw shafts 6A, 6B... So as to fit between the spiral blades 15a, 15b on the side not adjacent to the inter-shaft gap 5. The distance D is longer than the distance D, and they are spaced apart in the axial direction of the screw shaft.

The screw shafts 1A, 1B, 1C... Have double blade type spiral blades 13a, 13b that sandwich the driven roller 14 from both sides in the axial direction of the screw shaft, and the auxiliary screw shafts 6A, 6B. Although the double blade type spiral blades 15a and 15b sandwiched from both sides in the axial direction of the screw shaft are provided, the feed pitch is not the same. In the illustrated embodiment, as shown in FIGS. 1 and 2, a low-speed drive area A1 from the free end of the screw shaft 1A to the intermediate position, and a high-speed to the intermediate position of the low-speed drive area A1 and the next screw shaft 1B. A drive region A2 and a low-speed drive region A3 subsequent to the high-speed drive region A2 are provided. The high-speed drive region A2 and the next low-speed drive region A3 each include one transfer region B1, B2. In these transfer areas B1, B2, the auxiliary screw shafts 6A, 6B,... From the auxiliary driven roller 16 at a position slightly ahead of the auxiliary driven roller 16, the driven roller 14 paired with the auxiliary driven roller 16 exceeds the inter-screw shaft gap 5. The lower screw shafts 1B, 1C... Are areas up to the driven roller 14 when entering the upper side, and each of the auxiliary screw shafts 6A, 6B ... And the auxiliary screw shafts 6A, 6B. It includes one adjacent gap portion 5 between the screw shafts and end regions of the screw shafts 1A, 1B, 1C,.

The feed pitch P1 of the spiral blades 13a, 13b or 15a, 15b included in the low speed drive areas A1, A3 of the screw shafts 1A, 1B, 1C... And the auxiliary screw shafts 6A, 6B. It is smaller than the feed pitch P2 of the included spiral blades 13a, 13b or 15a, 15b, and these feed pitches P1, P2 are both of the distance D in the axial direction of the screw shaft between the driven roller 14 and the auxiliary driven roller 16. is an integer fraction, in the illustrated example, the feed pitch P1 is 1/4 of the distance D, feed pitch P2 is 1/2 of the distance D.

  According to the above configuration, the motor 12 with speed reducer is operated so that all the screw shafts 1A, 1B, 1C... And the auxiliary screw shafts 6A, 6B. When the conveyance carriage 2 is driven to rotate in the forward direction shown in FIG. 1, the driven roller 14 is located at the start position of the travel path on the screw shaft 1A side and the spiral blades 13a and 13b of the screw shaft 1A in the low speed drive region A1. The transport carriage 2 fitted and waiting in between starts traveling forward at a low speed corresponding to the feed pitch P1 of the screw shaft 1A in the low speed drive region A1. When the driven roller 14 is moved between the spiral blades 13a and 13b in the next high-speed drive region A2 from the space between the spiral blades 13a and 13b in the low-speed drive region A1 of the screw shaft 1A by the travel of the transport cart 2, the travel speed of the transport cart 2 is reached. Is switched to a high speed corresponding to the feed pitch P2 of the screw shaft 1A in the high speed drive region A2. At this time, since the auxiliary driven roller 16 is in a free state, the speed of the transport carriage 2 can be switched without any trouble. Then, the transport carriage 2 that travels at a high speed in the high-speed drive area A2 enters the transfer area B1 included in the high-speed drive area A2, and travels in the transfer area B1 at a high speed corresponding to the feed pitch P2. However, shortly before the front driven roller 14 reaches the end of the screw shaft 1A, the rear auxiliary driven roller 16 changes and enters between the spiral blades 15a and 15b of the auxiliary screw shaft 6A in the region B1. .

  With the above action, even if the driven roller 14 is detached from the screw shaft 1A as the conveyance carriage 2 travels, the conveyance carriage 2 is not interrupted by the auxiliary driven roller 16 receiving thrust from the auxiliary screw shaft 6A. Continue high-speed driving. At this time, the driven roller 14 moves in the gap 5 between the screw shafts 1A and 1B. When the auxiliary driven roller 16 moves away from the auxiliary screw shaft 6A as the transport carriage 2 travels, the front driven roller 14 that has moved in the gap 5 has already been turned into the spiral blades 13a and 13b of the lower screw shaft 1B. Since the vehicle has entered between, the transport carriage 2 continues to receive a thrust from the screw shaft 1B via the driven roller 14 and continue to run at a high speed.

  When the driven roller 14 of the transport carriage 2 moves between the spiral blades 13a and 13b in the next low speed drive area A3 from between the spiral blades 13a and 13b in the high speed drive area A2 of the screw shaft 1B, the traveling speed of the transport carriage 2 is The high speed corresponding to the feed pitch P2 of the screw shaft 1B in the high speed drive region A2 is switched to the low speed corresponding to the feed pitch P1 of the screw shaft 1B in the low speed drive region A3. At this time, since the auxiliary driven roller 16 is in a free state, the speed of the transport carriage 2 can be switched without any trouble. Thereafter, the driven roller 14 of the transport carriage 2 enters the transfer area B2 included in the low speed drive area A3 and travels in the transfer area B2 at a low speed corresponding to the feed pitch P1. Shortly before the front driven roller 14 reaches the end of the screw shaft 1B, the rear auxiliary driven roller 16 moves between the spiral blades 15a and 15b of the auxiliary screw shaft 6B in the transfer region B2.

  Even if the driven roller 14 is detached from the screw shaft 1B as the conveyance carriage 2 travels, the conveyance carriage 2 is not interrupted by the auxiliary driven roller 16 receiving thrust from the auxiliary screw shaft 6B. Continue running at low speed. At this time, the driven roller 14 moves in the gap 5 between the screw shafts 1B and 1C. When the auxiliary driven roller 16 moves away from the auxiliary screw shaft 6B as the transport carriage 2 travels, the front driven roller 14 that has been moved through the gap 5 has already been turned into the spiral blades 13a, 13b of the lower screw shaft 1C. Since the vehicle has entered between, the transport carriage 2 continues to be driven at low speed by receiving thrust from the screw shaft 1 </ b> C via the driven roller 14.

As described above, the transport carriage 2 is automatically switched to the low speed or the high speed corresponding to the feed pitches P1 and P2 in each area through the low speed driving area A1, the high speed driving area A2, and the low speed driving area A3 in order. However, in each of the transfer areas B1, B2..., The auxiliary driven on the rear side of the transport carriage 2 propelled by the screw shafts 1A, 1B, 1C. The screw shafts 1A, 1B, 1C, and the auxiliary screw shafts 6A, 6B in parallel with the screw shaft 1A, so that the roller 16 can enter the spiral blades 15a, 15b of the auxiliary screw shafts 6A, 6B,. The spiral blades 13a and 13b and the spiral blades 15a and 15b have the same feed pitch, and the phases are precisely aligned. Further, the driven rollers 14 that are disengaged from the upper screw shafts 1A, 1B, 1C,... Can enter the spiral blades 13a, 13b of the lower screw shafts 1B, 1C,. In the transfer regions B1, B2,..., The spiral blades 13a, 13b at the ends of the two front and rear screw shafts 1A, 1B, 1C,. Accurately aligned.

  The traveling path of the transport carriage 2 is a transport carriage between the forward path and the backward path having the screw shafts 1A, 1B, 1C... And the auxiliary screw shafts 6A, 6B. When a traverser with a turntable that transversally feeds 2 and reverses the front and rear is formed into a rectangular endless circulation path, each screw shaft 1A, 1B, 1C... And auxiliary screw shafts 6A, 6B. Can be rotated in a certain direction to make the traveling direction of the transport carriage 2 constant, but when the transport carriage 2 is reciprocated on one straight path, the screw shafts 1A, 1B, 1C. The auxiliary screw shafts 6A, 6B,. In the embodiment shown in FIGS. 1 and 2, when the screw shafts 1A, 1B, 1C... And the auxiliary screw shafts 6A, 6B. The auxiliary driven roller 16 that moves is connected to the screw shafts 1B and 1A on the lower side before the driven roller 14 on the rear side is disengaged from the screw shafts 1C and 1B. 15b enters and receives thrust, and before the auxiliary driven roller 16 is detached from the auxiliary screw shafts 6B and 6A, the rear driven roller 14 enters between the spiral blades 13a and 13b of the lower screw shafts 1B and 1A. Therefore, as in the case of the forward traveling, the transport carriage 2 is used to Without being affected by Yushafuto voids unit 5 can be continuously running at a predetermined speed that is set for each region.

  Furthermore, the screw shaft in the screw-driven transfer device of the present invention can be used as a means for driving and propelling the transfer carriage of the carriage type conveyor that runs on the guide rail laid on the floor surface. It can also be utilized as a means for driving and propelling a transport carriage of an overhead conveyor that is supported by a guide rail installed at an appropriate height. In addition, the position of the screw shaft with respect to the transport cart is not limited to the lower side of the transport cart, and can be arbitrarily determined depending on the support structure of the transport cart, the load loading structure, etc. Can be set. Therefore, the parallel direction of the screw shaft and the auxiliary screw shaft provided alongside the screw shaft is not limited to the horizontal horizontal direction, but can be parallel to the vertical direction. Further, the driven roller and the auxiliary driven roller can also be axially supported so that the axial center thereof is not in the vertical direction but in the horizontal direction.

It is a schematic plan view of the principal part explaining the structure of a conveying apparatus. It is a schematic side view of the principal part. It is a rear view which shows the starting end part of a conveyance trolley travel route. It is a vertical front view in the middle of a conveyance trolley travel route. It is an enlarged plan view of the principal part which shows the interlocking structure of a screw shaft and an auxiliary screw shaft.

Explanation of symbols

1A, 1B, 1C Screw shaft 2 Carriage trucks 3a, 3b Guide rails 4a, 4b Wheel 5 Space between screw shafts 6A, 6B Auxiliary screw shafts 7, 8 Bearings 9-11 Transmission means 12 Motors 13a, 13b with reduction gears Spiral blade 14 driven roller 15a, 15b auxiliary screw shaft spiral blade 16 auxiliary driven roller A1, A3 low speed drive area A2, high speed drive area B1, B2 transfer area P1, P2 screw shaft (spiral blade) feed pitch D driven roller and Axial distance between screw shaft and auxiliary driven roller

Claims (3)

A plurality of screw shafts that are rotationally driven are arranged concentrically along the travel path of the transport carriage, and the transport carriage is provided with a driven roller that engages with the screw shaft, and the transport carriage is driven by the rotational drive of the screw shaft. in the transport device, for a screw drive that is configured to but is driven, the air gap is disposed between each screw shaft, next to side of one of the screw shaft end adjacent to the air gap between the screw shaft , feed pitch identical short auxiliary screw shaft and and the feed pitch is interlocked rotary drive and the one of the screw shaft the one of the screw shaft are arranged in parallel form, to the transport carriage, and the driven roller, the auxiliary screw Auxiliary driven roller that engages the shaft in the axial direction of the screw shaft The distance between the driven roller and the auxiliary driven roller in the axial direction of the screw shaft and the length of the auxiliary screw shaft are such that the auxiliary driven roller moves while the driven roller moves through the space between the screw shafts. A screw-driven transfer device that is set to engage the auxiliary screw shaft. The ends adjacent to the space between the screw shafts of each screw shaft are linked to each other by two transmission means that relay the ends of the auxiliary screw shaft on the space between the screw shafts. Screw drive conveyor.   It is configured so that the feed pitch of the screw shaft does not change in the transfer region including one auxiliary screw shaft and one gap between the screw shafts, and the front and rear two different screw shaft feed pitches are provided at locations other than the transfer region. The boundary of the region is arranged, and the feed pitch of the screw shaft in the transfer region is set to an integer of the interval in the axial direction of the screw shaft between the driven roller and the auxiliary driven roller. 2. A screw-driven conveying device according to 2.

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