JPH063929U - Feed screw exchange mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] The rationalization and replacement of feed screws for equipment such as carrier equipment that requires the exchange of feed screws. A mechanism for selecting and exchanging a feed screw 2 of a plurality of feed screws for feeding a rubber belt X by rotating the rubber belt X at a fixed position by connecting the drive shaft 4 with its axis centered horizontally. The mechanism 9 includes a bearing portion 20 for each feed screw 2, a support portion 30 that vertically supports each feed screw via the bearing portion and is capable of turning the feed screw into a horizontal support state, and a feed portion together with the support portion 30. a holder 10 provided with a moving unit 40 for changing the position of the screw, the shaft end portion 2a of the feed screw leveled at the supporting portion, a drive shaft 4 connected or released to the clutch 50 and - have deployed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a feed screw exchanging mechanism attached to a device for conveying an object by a feed screw and facilitating the exchange of the feed screw.

[0002]

[Prior art]

 As is well known, a screw (various kinds of screws including a ball screw) is sometimes used as a feed screw for conveying an object. If the male screw is rotated in place, the thing that engages with it-for example, an annular object that is hung in the thread groove, an object that is a screw that fits in the male screw, or a male screw and the outside The fluid filled between the mounted cylinder and the like can be sent along the axis of the male screw. The elastic ring counting device described in Japanese Patent Application Laid-Open No. 2-294892 is also a machine having a conveying part by a feed screw, and a belt or an O ring which is hung in the thread groove by a horizontally provided feed screw. Send the elastic ring such as to the counting position.

In such a feed screw type conveying device, when the kind or size of the material to be sent or the carrying condition is changed, the feed screw (male screw) may have to be replaced. . Also in the apparatus of the above publication, it is necessary to replace the feed screw with an appropriate groove width according to the width of the belt to be fed.

Therefore, in such a device, the feed screw is, of course, replaceably attached. Taking the device of the above publication as an example, the feed screw is attached to a drill chuck (a type of drive shaft) so that it can be attached and detached. To replace it, an operator loosens the chuck and removes the original screw. In addition, it is done by bringing another screw and inserting and fixing it in the chuck.

[0005]

[Problems to be solved by the device]

 As described above, in the mechanical devices that require replacement of the feed screw, not only can the feed screw be replaced, but in fact, there are means for streamlining the replacement work and the storage of the replacement product (feed screw). Is desired. If there is no such means, it will take time to replace and transport the screws, and a considerable space will be required for storage.

In the apparatus described in the above publication, the same means is not provided, so the feed screw must be replaced by the above-mentioned operation, but there is some waste in that regard. In other words, a) supporting the whole feed screw by hand and loosening or tightening the drill chuck in that state is not easy.B) Remove the original feed screw and the screw to be attached next. It takes a considerable amount of labor and time to carry it to and from each storage location. (C) A special space is required as a storage location (especially, when a long lead screw is stored sideways, a considerable floor area is required). Is needed).

The present invention aims to provide a mechanism for eliminating such waste and rationalizing the replacement and storage of the feed screw.

[0008]

[Means for Solving the Problems]

 The feed screw exchange mechanism of the present invention is such that the shaft center is horizontal (or horizontal axis, the same applies below) and is connected to the drive shaft to rotate at a fixed position so that the engaging object on the screw portion is moved along the shaft center. As a mechanism for selecting and exchanging one feed screw from a plurality of feed screws, the bearing part for each feed screw, and each feed screw vertically (or vertically, through the bearing. The same applies hereafter) A holder that includes a support part that supports the support screw and that can turn it into a horizontal support state, and a moving part that changes the position of the feed screw together with the support part, and the axial end of the feed screw that is leveled by the support part. It is equipped with a clutch that connects or disconnects the drive shaft.

[0009]

[Action]

 When the mechanism of the present invention is attached to a feed screw type conveying device, the feed screw is replaced like a nail. The description begins with the original lead screw already removed from the carrier and selecting an alternative lead screw.

1) The selected feed screw is moved to a predetermined position by the moving part of the holder described above. At this stage, all of the lead screws including the selected lead screw are vertically supported by the above-mentioned supporting portions via the bearing portions. With this support, all lead screws are moved by the moving parts of the holder.

2) The feed screw that has come to a predetermined position in 1) above is turned horizontally while being supported by the support portion. This turning may be performed by allocating an automatic means to the supporting part, but since at least a part of the feed screw is supported by the supporting part, it is a short work up to 3) below. However, the burden is light even if it is done by the workers.

3) The drive shaft is connected to the shaft end of the leveled feed screw via the clutch. This drive shaft is a part of the transfer device and transmits the driving force of a motor, etc., but the feed screw is in a fixed position (that is, it operates in the transfer device) by the time this shaft is started. Since it should be in a fixed position), after 2) above, before starting, add some changes to the feed screw etc. if necessary.

4) In the above state, the feed screw has the shaft end connected to the drive shaft by the clutch, and at least a part of the feed screw is supported by the support through the bearing. Then, the object rotates (horizontal position) and laterally feeds the object (the engaging object on the screw part such as the annular object as described above).

5) When removing the feed screw attached to the transport device as described above in order to replace it with another feed screw, contrary to the above, the connection with the drive shaft is released by the clutch ( (If necessary, change the position slightly), return the lead screw from horizontal to vertical, and then move the position to select another screw.

Of the above-mentioned actions of the exchange mechanism of the present invention, the following three points are particularly noteworthy. That is, first, in the vertical support state described in 1) above, even long lead screws do not occupy a large floor area, in other words, they are replaced near the transfer device without taking up much space. Multiple lead screws for storage are stored. Secondly, the movement (transport) of the feed screw between the storage location and the transport device is short because of the short distance, and it is performed by the moving part of the holder (see 1) above). The effort on the staff is minimal. And third, since the feed screw is always supported by the support via the bearing, it is not easy to connect the feed screw to the drive shaft according to 2) and 3) above.

[0016]

【Example】

 1 to 3 are views showing an embodiment of the present invention. That is, FIGS. 1 and 2 show a front view and a plan view, respectively, of an example in which the feed mechanism 2 for exchanging the feed screw 2 is attached to the conveying device 1 for the rubber belt X, and FIG. 3 shows a procedure for using the exchange mechanism 9. It shows.

The conveying device 1 is a device for laterally feeding an annular rubber belt X for counting, as shown in FIG. 1, according to the same principle as the counting device described in the above-mentioned publication. A feed screw 2 is provided horizontally as a means of lateral feed, and is connected to a drive shaft 4 driven by a drive source (motor, speed reducer, etc.) 3 via a transmission belt 3b and pulleys 3a and 3c. Rotate. The belt X hooked in the thread groove of the feed screw 2 and fed to the right side of the figure, the entanglement and the crossing between them are released while coming into contact with the sorting roller 7, and one belt is fed from the end of the screw 2. Each of them is sent out to reach the counting device 8 including an optical sensor (not shown) and the like. Note that reference numeral 5 is a loading sleeve, which is passed over the screws 2 by hanging a large number of uncounted belts X when the feed screw 2 is attached at a fixed position shown in the figure and ready for transportation. Is a push bar for pushing the thus set belt X 1 on the loading sleeve 5 to the thread groove portion.

When the size (particularly the width) of the belt X to be conveyed and counted is changed, the feed screw 2 needs to be replaced with one having a different thread groove. The feed screw exchange mechanism 9 is attached. This mechanism 9 hangs and holds a total of eight feed screws 2 and facilitates the work of selecting one of the screws 2 to bring it into the operating state shown in FIGS. 1 and 2. In general, it comprises a holder 10 for holding the screw 2 and a clutch 50 for transmitting driving force. The exchange mechanism 9 will be described below with reference to FIGS. 1 and 2.

The holder 10 has the following structure. First, the rotary frame 32 is placed on the base 42 provided on the fixed frame 43. The rotating frame 32 is rotatable on the base 42 because a plurality of rolling rollers 41 arranged side by side in the circumferential direction are in contact with each other and placed on the base 42. Eight bearing cases 22 are attached to the rotary frame 32 via pin-type hinges 31 so that they can be swung, and are mounted at equal intervals in the circumferential direction. The swinging of each bearing case 22 is allowed within the vertical plane and at least within a range of 90 ° from the vertical axis to the horizontal axis. The feed screw 2 is mounted rotatably via two bearings 21 housed in each bearing case 22 and restricted in its movement in the axial direction.

From a functional view of each part of the holder 10, the bearing 21 and its case 22 are the bearing portion 20 for the feed screw 2, and the hinge 31 and the rotating frame 32 make the screw 2 vertical or horizontal. The supporting portion 30 for supporting, and the roller 41, the base 42, and the fixed frame 43 are the moving portion 40 for changing the position of the screw 2 along the circumference.

The clutch 50 is means for connecting the selected feed screw 2 and the drive shaft 4 connected to the drive source 3 as described above, and as shown in the drawing, the clutch sleeve 51 and its shift case 52 / operation lever. 53 / clutch base 54 and the like. The clutch sleeve 51 is fitted on the outside of the drive shaft 4 via a long key 4b and the like, and the right part of the drawing is formed on the shaft end 2a (formed in a rectangular cross section) of the feed screw 2. On the other hand, it was possible to fit from the outside. The shift case 52 mounted on the outside of the sleeve 51 via a bearing is connected to the operation lever 53, and the sleeve 51 is slid in the axial direction when the lever 53 is tilted. When the lever 53 is tilted to the right in the figure, the sleeve 51 slides to the right with the key 4b in between, and is connected to the shaft end 2a of the feed screw 2 to be in a power transmission state. When the lever 53 is tilted to the left, the connection is released. Further, the clutch base 54, which has the fulcrum portion of the lever 53 and the bearing portion 4a of the drive shaft 4 on the upper surface, is capable of horizontally swiveling about the same rotation center as the moving portion 40 by 30 °, and both ends of the swiveling range. The ball plunger 54a is attached to the lower surface so as to determine the stop position. Since the drive shaft 4 turns along with this turning, it is preferable that the drive source 3 also turns, but in this mechanism 9, the drive source 3 is fixed. This is because the turning angle of the drive shaft 4 is as small as 30 °, and the transmission belt 3b (made of rubber) that connects the drive source 3 and the drive shaft 4 has a stretchable ability.

The operation procedure of the exchange mechanism 9 will be described below with reference to FIGS. 3 (a) to 3 (d).

First, FIG. 3 (a) shows that the conveyor 2 conveys a belt X of a specific size by using the screw 2A of the eight feed screws 2. It is in the same state as. At this time, the screw 2A is horizontally supported by the support portion 30A of the holder 10 via the bearing portion 20A, and the shaft end portion 2Aa is connected to the drive shaft 4 by the sleeve 51 of the clutch 50 and is rotationally driven. The remaining seven screws such as the screws 2B and 2C are all vertically supported by the holder 10 such that the screws 2B are vertically hung from the support 30B via the bearing 20B.

After the conveyance of the belt X is completed, in order to replace the feed screw 2A used for the feed screw 2 with another feed screw 2, first, as shown in FIG. Utilizing this, all the screws 2 are moved to the right by 30 ° together with the supporting portion 30 (rotating frame 32). At this time, the drive shaft 4 and the clutch 50 together with the screw 2A are also rotated 30 ° to the right.

Next, the lever 53 of the clutch 50 is operated to pull out the sleeve 51 from the shaft end portion 2Aa of the screw 2A as shown in FIG. 3 (c), whereby the connection between the drive shaft 4 and the screw 2A is released. . During this operation, it is advisable to lightly support the screw 2A with one hand so that the screw 2A does not suddenly swing down to the vertical posture due to its own weight.

After the connection with the drive shaft 4 is released, the screw 2A is made vertical as shown in FIG. 3 (d). After moving 30 ° as above (Fig. 3 (b)), the screw 2A is made vertical in this way. The screw 2A should be placed directly below the screw 2 (2A) in the state of Fig. 3 (a) or Figs. This is because devices (not shown) related to the counting device 8 and the push bar 6 are arranged, and if the screw 2 is lowered vertically at that position, the screw 2 will hit those devices.

In the state of FIG. 3 (d), all the screws 2 are released from the connection with the clutch 50 and the drive shaft 4 and are vertically lowered, so that the moving part 40 and the supporting part 30 together on the circumference. The position can be changed. When the required (selected) screw 2 comes to the position where the screw 2A was located (the direction of the axis of the drive shaft 4) by turning the rotating frame 32 of the support portion 30, the screw 2 is now turned. Moves and turns to the fixed position (working position) of the transfer device 1 in the reverse order of the above. That is, by raising the screw 2 horizontally and connecting it to the drive shaft 4 with the clutch 50, and further turning it together with the clutch 50 by 30 ° to the left in the drawing, the screw shown in FIG. 3 (a) and FIGS. Set the state and start the drive source 3. Since the drive shaft 4 and the screw 2 can be connected (and released) by one-touch operation of the clutch 50, the series of operations described above can be completed within an extremely short time.

Although one embodiment has been introduced above, the mechanism of the present invention is not limited to this embodiment. That is, for example, it can be implemented as follows. Of course, you can freely set the number and type of feed screws you have. The supporting and moving parts in the holder do not support multiple feed screws lined up in the circumferential direction and move (rotate) in the same direction. For example, they support them along a straight line and move linearly. It may be one that does. If there is no obstacle like this example directly under the feed screw in the operating position, it is not necessary to turn the feed screw by 30 ° and then lower it vertically as described above. It doesn't have to be possible. The drive shaft and clutch may be separate components from the holder (ie, not mounted on fixed frame 43 in FIG. 1) and may be located in different positions. Not only the feed screw that conveys the rubber belt for counting, but for example, an O-ring or other ring-shaped object is sent for the same purpose, the object is slid through a screwed female thread, or a fluid such as a conveyor type is used. It can also be used as a mechanism for exchanging various feed screws for transfer.

[0029]

[Effect of device]

 According to the feed screw exchange mechanism of the present invention, it is possible to quickly and easily perform the exchange (including transportation) of the feed screw required in the screw type transfer device, etc., and reduce the space required for storage. . From these points, productivity improvement and space saving in the factory will be brought about.

[Submission date] October 1, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction content]

[0002]

[Prior art]

As is well known, a screw (various kinds of screws including a ball screw) is sometimes used as a feed screw for conveying an object. If the male screw is rotated in place, it will engage with it -- for example, an annular object that is hung in the thread groove, an integral part of the male screw that fits the male screw, or a male screw that is attached to the outside of the male screw. It is possible to send the fluid filled in the space between the formed cylinder and the like along the axis of the male screw. The elastic ring counting device described in Japanese Patent Application Laid-Open No. 2-294892 is also a machine having a conveying part by a feed screw, and a belt or an O ring which is hung in the thread groove by a horizontally provided feed screw. Send the elastic ring such as to the counting position.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction content]

In the apparatus described in the above publication, the same means is not provided, so the feed screw must be replaced by the above-mentioned work, but there is some waste in that regard. In other words, a) supporting the entire feed screw by hand and loosening or tightening the drill chuck in that state is not easy.B) The original feed screw removed and the screw to be attached next It takes a considerable amount of labor and time to carry it to and from each storage location. (C) A special space is required as a storage location. is required) - improvement is awaited in terms such as.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

[0008]

[Means for Solving the Problems]

The feed screw exchange mechanism of the present invention is such that the shaft center is horizontal (or horizontal axis, the same applies below) and is connected to the drive shaft to rotate at a fixed position so that the engaging object on the screw portion is moved along the shaft center. As a mechanism for selecting and exchanging the feed screw of the feed − from a plurality of feed screws, the bearing portion for each feed screw, and each feed screw vertically (or vertically, through the bearing portion. The same applies below). A holder that includes a support part that supports the support screw and that can turn it into a horizontal support state, and a moving part that changes the position of the feed screw together with the support part, and the axial end of the feed screw that is leveled by the support part. to a clutch for connecting or releasing the drive shaft - it is obtained by deploying.

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

Of the above-mentioned actions of the exchange mechanism of the present invention, the following three points are particularly noteworthy. That is, firstly, in the vertical support state described in 1) above, even long feed screws do not occupy a large floor area, in other words, they are for replacement in the vicinity of the transfer device without taking up too much space. Multiple lead screws of are to be stored. Secondly, the work of moving (transporting) the feed screw between the storage location and the transport device is short because of the short distance, and is performed by the moving part of the holder (see 1 above). The effort on the staff is minimal. And third, because the feed screw by the supporting portion through the bearing portion is always supported, 2 above), 3) according to that operation of connecting the feed screw to the drive shaft is easy - a.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction content]

From a functional view of each part of the holder 10, the bearing 21 and its case 22 are the bearing portion 20 for the feed screw 2, and the hinge 31 and the rotating frame 32 make the screw 2 vertical or horizontal. supporting portion 30 supports and rollers 41 and the base 42 and fixed frame 43, is, Ru moving part 40 der for changing the position of the screw 2 along the circumference - can be distinguished as.

[Brief description of drawings]

1 is a front view (a part of which is a cross-sectional view) of a rubber belt conveying device and a feed screw exchanging mechanism attached thereto according to an embodiment of the present invention;

FIG. 2 is a plan view (partially shown in cross section) of the device and mechanism of FIG.

3] Regarding the feed screw exchange mechanism of FIG. 1, (a) and (b)
It is a plan view showing a use procedure in the order of (c) and (d).

[Explanation of symbols]

 2 Feed screw 4 Drive shaft 9 Feed screw exchange mechanism 10 Holder 20 Bearing part 30 Support part 40 Moving part 50 Clutch

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[Procedure amendment]

[Submission date] June 23, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Fig. 2]

[Figure 1]

[Figure 3]

Claims (1)

[Scope of utility model registration request] 1. A feed screw for feeding an engagement product on a threaded portion along a shaft by rotating the shaft at a horizontal position and being connected to a drive shaft at a fixed position. A mechanism for selecting and exchanging, which includes a bearing portion for each feed screw, a support portion that vertically supports each feed screw through the bearing portion, and that is capable of turning the feed screw into a horizontal support state, and its support. A feed screw, comprising: a holder having a moving portion that changes the position of the feed screw for each part; and a clutch that connects or disconnects the drive shaft to the shaft end portion of the feed screw that is horizontal by the support portion. Exchange mechanism.