JPH0541392B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention provides a bolt polishing device particularly suitable for automatically polishing the tip screw shaft of a large and heavy bolt.

(Conventional technology and its problems) In large mechanical devices that use long (for example 600 mm to 1800 mm) and large diameter bolts, the bolts are regularly removed to prevent the tip screw shaft from rusting. Some items require polishing to remove them. In such cases, conventionally, the removed bolt was supported with an appropriate jig, and the polishing work was carried out by manually applying a rotating polishing brush set in an air grinder to the side surface of the screw shaft at the end of the bolt. Not only did it require a great deal of effort and time, but it also had the disadvantage of being potentially dangerous.

In order to solve these problems, an automatic polishing device is required that automatically polishes the bolt to be polished that is set at a predetermined position. 1978-
It is conceivable to replace the grinding means in a grinding machine equipped with a loading and unloading device as disclosed in Japanese Patent No. 196951 with a bolt grinding means.

With the configurations disclosed in these publications, it is possible to carry out loading, in which the unprocessed work is carried into the processing position, and unloading, in which the machined work is carried out from the processing position, at the same time. The workpiece is sequentially transported from a pre-processing standby position, via a processing position, to a processed workpiece take-out position along a circular endless transport path formed by a disc-shaped workpiece support plate. The space occupied by the entire apparatus including the workpiece conveyance path becomes very large, and the apparatus cannot be used as a means for loading and unloading a large and heavy bolt polishing apparatus as described above.

In addition, in the device disclosed in the latter publication, the loading device and the unloading device each consist of two independently installed manipulators, which is also suitable for polishing devices for large and heavy bolts. In order to apply the manipulator as a conveyance means for transporting the manipulator, each manipulator, each having its own drive means, becomes large and extremely expensive, which is also impractical.

Furthermore, in order to be able to polish bolts that have threaded shafts at both ends to be polished, it would be difficult to install polishing means at each end of the bolt set at the polishing position, which would increase the overall size of the device. However, it is difficult to put it into practical use because of the large increase in costs.

(Means for Solving the Problems) The present invention has been made in order to solve the above-mentioned conventional problems, and its features are indicated by reference numerals in the embodiments described below. The bolt polishing device of the present invention is a bolt polishing device in which a polishing means 9 for the threaded shaft portion of the bolt end is disposed on one side in the axial direction of the bolts B and B' to be polished, which are automatically supported on the bolt support means 1. In the device, bolt temporary receiving means 42 and 43 are respectively disposed at symmetrical positions on both sides of the bolt support means 1 in the front and rear directions perpendicular to the axial direction of the bolts B and B' on the means 1. and transfer the bolt on the bolt temporary receiving means 42 on the import side onto the bolt supporting means 1,
In a bolt polishing apparatus that is provided with a bolt transfer means 50 for transferring the polished bolt on the bolt support means 1 onto the bolt temporary receiving means 43 on the unloading side, the bolt transfer means 50 performs the following steps. A pair of front and rear bolt support stands 56, 57 arranged in parallel in the front-rear direction at an interval substantially equal to the interval between the bolt support means 1 and each bolt temporary reception means 42, 43, and both of these bolt support stands 56, 57. A lifting drive means (elevating platform 5) for raising and lowering the
4 and the cylinder/piston unit 55), and the two bolt support stands 56, 57 are placed at positions corresponding to the bolt temporary receiving means 42 and the bolt support means 1 on the loading side, and the two bolt support stands 56, 5
7 is composed of a forward and backward drive means (a movable base 51 and a cylinder/piston unit 52) that integrally reciprocates between a position corresponding to the bolt support means 1 and the bolt temporary receiving means 43 on the unloading side. , Of the pair of front and rear bolt supports 56 and 57,
At least one bolt support 56 is connected to the vertical shaft 6
It is characterized by being configured to be able to rotate within a range of at least 180 degrees around zero.

(Embodiment) Hereinafter, an embodiment of the present invention will be described based on the attached illustrative drawings. In FIGS. 1 to 3, reference numeral 1 indicates a bolt support that supports a bolt to be polished horizontally so as to be rotatable on its axis. The means consists of a pair of left and right roller units 2 and 3 provided at the center of the base F, and each roller unit 2 and 3 is a pair of front and rear roller units supported by a slide guide 4 so as to be movable in the front and rear directions. Movable bodies 5a, 5b, bolt supporting rollers 6a, 6b pivotally supported by the movable bodies 5a, 5b, respectively;
The screw shaft 8 is rotatably supported at one end of the slide guide 4, and has threaded portions 8a and 8b whose screw directions are opposite to each other. The movable bodies 5a, 5b
It is threaded through the screw hole. Therefore, this screw shaft 8
By rotating forward and backward, the movable bodies 5a,
5b in the direction toward each other or in the direction away from each other, and the pair of bolt supporting rollers 6
The distance between a and 6b can be freely changed.

9 is a polishing means, a transverse motion table 10, a drive means 11 for moving this transverse motion table 10, and the transverse motion table 10.
Three air motor units (air grinder, etc.) 1 attached to a vertical wall 10a erected
2a to 12c, and each air motor unit 12
Rotating polishing brushes 13 set at a to 12c
It is composed of a to 13c. This polishing means 9
are arranged on a base F on one left and right side of the bolt support means 1, and the lateral movement base 10 includes a pair of guide rails 14 fixed to the base F, and a pair of guide rails 14 that are arranged vertically on the guide rails 14. It can freely reciprocate in the direction of the bolt axis by means of guide wheels 15 which are pivotally supported on both sides of the transverse movement table 10 so as to be sandwiched therebetween. Further, the driving means 11 includes a pair of gear wheels 18 and 19 supported via support shafts 16 and 17 at positions below both ends of the movement path of the traversing table 10 within the base F; ,1
Chain 20 suspended between 9 and one gear wheel 1
9 from the side of the base F via its support shaft 17, and a part of the chain 20 is connected to the bottom of the transverse movement table 10 via an attachment 20a. .

The three air motor units 12a to 12
c is the horizontal moving table vertical wall 1 as shown in FIG.
The air motor unit 12a, which is arranged at three places around the circular through hole 10b provided in the hole 10a and located at the upper center, is supported by a bracket 22 that is attached to the vertical wall 10a so as to be movable and fixed in the vertical direction. The two air motor units 12b and 12c located on both sides of the lower part are respectively supported by the free ends of arms 23 and 24 attached to the vertical wall 10a so as to be able to swing freely relative to each other in the distance direction. 25
is a nut (or bolt) with a handle that fixes the bracket 22 at any position within the vertical elongated hole 26 provided in the vertical wall 10a. Reference numeral 27 denotes a vertical screw shaft for suspending the bracket 22, which passes through a support plate 10c protruding from the upper end of the vertical wall 10a, and a nut 28 with a handle is screwed onto the upper side of the support plate 10c. There is. Therefore, by rotating the nut 28 forward and backward with the nut 25 loosened, the air motor unit 12a can be raised and lowered together with the bracket 22. Numerals 29 and 30 are nuts (or bolts) with handles for fixing the arms 23 and 24 at arbitrary angles.

As shown by imaginary lines in FIG. 2, the three polishing rotary brushes 13a to 13c driven by the air motor units 12a to 12c are surrounded by a protective cover 31, and rust is removed from the underside. A saucer 32 can be provided. Further, when the protective cover 31 is made of an opaque material, it is desirable to provide a viewing window 31a at an appropriate location. These protective covers 31 and rust trays 32 are connected to the horizontal movement table 10.
mounted on.

In FIGS. 1 and 2, 33 is a stopper for positioning the bolt B to be polished, and is disposed on the opposite side of the bolt support means 1 from the side where the polishing means 9 is located. This stopper 33 includes a movable base 35 supported movably in the axial direction of the bolt to be polished B by a slide guide 34 provided on the base F, and an elevating member 36 supported on the movable base 35. , and the bolt support means 1 of this elevating member 36
It is composed of a freely rotatable ball 37 protruding from the side, and the movable base 35 can be fixed at any position within the range of a long hole 38 provided on the base F by a nut (or bolt) 39 with a handle. The height of the elevating member 36 can be adjusted by rotating the screw shaft 40 with a handle in forward and reverse directions. still,
41a and 41b are bolt guides attached to the movable table 35 in a cantilevered manner.

As shown in FIG. 1, FIG. 3, and FIG.
2,43 are provided. Which means 42,4
3 is also composed of four bolt support plates 44 and 45 arranged in parallel at appropriate intervals in the axial direction of the bolt to be polished B, and each bolt support plate 44 of the carry-in side bolt temporary receiving means 42 is connected to the bolt support means 1. It has an upper edge 44a that slopes lower as it approaches, and a bolt receiving protrusion 4 at the lower end of the upper edge 44a.
4b. Further, each bolt support plate 45 of the temporary bolt receiving means 43 on the unloading side has an upper edge 45a that slopes downwardly as the distance from the bolt support means 1 increases, and a bolt fall prevention protrusion 45b is provided at the higher end of the upper edge 45a. We are prepared. Further, among the four bolt support plates 45, the two inner bolt support plates are provided with automatic opening/closing stoppers 46. This automatic opening/closing stopper 46 is pivotally supported on the side of the bolt support plate 45 by a horizontal support shaft 47 so as to be able to swing up and down, and is located between an integrally connected arm 48 with a roller and the bolt support plate 45. A tensioned spring 49 holds it in the upright position shown in FIG.

As shown in FIG. 5, each bolt support plate 44 in the bolt temporary receiving means 42 on the loading side has a bolt elevating guide rail portion 44c extending downward from its outer end to a position near the lower end of the base F. They are installed consecutively.

As shown in FIGS. 1, 2, and 5, a bolt transfer means 50 is provided between the pair of left and right roller units 2 and 3 in the bolt support means 1. This bolt transfer means 50 includes a movable table 51 provided in a base F that is movable back and forth, a cylinder/piston unit 52 that reciprocates this movable table 51, and two elevating rods on the movable table 51, front and rear. 53, a cylinder/piston unit 55 for driving the lifting table 54 up and down, and a pair of front and rear bolt support stands 56 and 57 supported on the lifting table 54. Reference numeral 58 denotes a pair of left and right guide rails that support the movable base 51 so as to be movable back and forth via guide wheels 59 pivotally supported on both left and right sides of the movable base 51.

A pair of front and rear bolt support stands 5 on the lifting table 54
6 and 57 are arranged side by side with the same spacing as the spacing between the bolt support means 1 in the center and the bolt temporary reception means 42 and 43 on both the front and rear sides, and each is composed of a pair of left and right V-shaped plates 56a and 57a. has been done.
Moreover, one bolt support stand 56 is shown in FIGS. 6 and 7.
As shown in the figure, a vertical shaft 60 protruding downward from the bolt support base 56 is rotatably connected to a bearing member 61 fixed on the lifting stage 54 via a bearing 62, so that the vertical axis Furthermore, a spring plunger 63 for preventing rotation is attached to an eccentric position at the bottom of the bolt support base 56 by screw fitting, and the lifting base 54
Two recesses 64a and 64b into which a ball 63a protruding from the lower end of the plunger 63 fits are provided at two locations in the diametrical direction on the upper surface of the side bearing member 61.

As shown in FIGS. 1, 3, and 5, bolt carrying means 65 and bolt carrying means 66 are provided on both front and rear sides of the base F. Both means are equipped with horizontally elongated elevating members 71 and 72 supported at both ends by a pair of left and right elevating guide columns 67 and 68 through guide wheels 69 and 70 so as to be freely movable up and down, and are provided with horizontally elongated elevating members 71 and 72 of the bolt carrying means 65. , bolt support plates 73 having upper edges inclined in the same direction as the upper edges 44a of each bolt support plate 44 in the bolt temporary receiving means 42 are protruded at appropriate intervals. The elevating member 72 has an upper edge that is inclined in the same direction as the upper edge 45a of each bolt support plate 45 in the bolt temporary receiving means 43, and a projection 74a for preventing bolts from falling at the lower end thereof. Bolt support plates 74 are provided to protrude at appropriate intervals. Furthermore, the third
As shown in the figure, the arm 48 with a roller of the automatic opening/closing stopper 46 in the bolt temporary receiving means 43 projects into the elevating path of the horizontally elongated elevating member 72 in the bolt carrying means 66.

As shown in FIGS. 5 and 8, a lifting drive wire 75 is connected at one end to each end of the horizontally elongated lifting member 71 in the bolt carrying means 65.
a and 75b are horizontal shaft sheaves 76a and 76b that are pivotally supported on the upper ends of the elevation guide columns 67 on both sides, and a horizontal shaft sheave 77a that is pivotally supported on the side of the base F at a position directly below these sheaves 76a and 76b. , 77b, vertical shaft sheaves 78a, 78b pivotally supported on the bolt carrying means 65 side in the base F, and wire end locking fittings via movable vertical shaft sheaves 79a, 79b provided in the base F. It is fixed at 80a and 80b. The movable vertical shaft sheaves 79a and 79b are
The movable bodies 82a and 82b are supported by slide guides 81a and 81b so as to be movable in the front and rear directions, respectively, and are supported by springs 83a and 83b in the direction of loosening the wires 75a and 75b, respectively. The wires 84a and 84b, which have one end connected to these movable bodies 82a and 82b, are connected to a movable body 86 which is pivotally supported at both left and right ends of another movable body 86 which is driven in the front and back direction by a cylinder/piston unit 85. Other wire end locking fittings 88a, 88b are installed in parallel with the wire end locking fittings 80a, 80b via vertical shaft sheaves 87a, 87b.
is fixed.

According to the elevating drive means 89 configured as described above, by pulling back the movable body 86 from the limit position shown in FIG. Wire 84 hanging from 87b
a, 84b are loosened, and the movable bodies 82a, 82b are pulled by the springs 83a, 83b and move backward by a distance twice the distance of the backward movement of the movable body 86. As a result, the wires 75a, 75b suspended on the movable vertical shaft sheaves 79a, 79b on the movable bodies 82a, 82b
The elongated elevating member 71, which is suspended by the wires 75a and 75b, is loosened by an amount twice the distance of the backward movement of the wires 75a and 75b, and the gravity moves downward. Therefore, the downward stroke of the horizontally elongated lifting member 71 is caused by the movement of the movable body 86.
, that is, four times the piston stroke of the cylinder/piston unit 85.

When raising the horizontally elongated lifting member 71 that has been lowered, the movable body 86 is moved forward by the cylinder/piston unit 85, and the wires 84a, 84 are moved forward.
The movable bodies 82a, 82b may be pulled against the springs 83a, 83b via the springs 83a, 83b. As a result, the horizontally elongated elevating member 71 lifts the wire 75 by a distance four times the forward movement distance of the movable body 86 (the piston stroke of the cylinder/piston unit 85).
It is lifted up by a and 75b.

Horizontally elongated lifting member 72 in bolt carrying means 66
As shown in FIG. 8, the lifting/lowering drive means 90 is exactly the same as the lifting/lowering driving means 89 for the horizontally elongated lifting member 71 in the bolt carrying means 65, and the wires 91 corresponding to the wires 75a, 75b are
a, 91b, movable bodies 92a, 92b corresponding to the movable bodies 82a, 82b, the wire 84a,
Wires 93a and 93b corresponding to 84b, a cylinder/piston unit 94 corresponding to the cylinder/piston unit 85, and the movable body 8
Since the movable body 95 and the like corresponding to No. 6 are used, and the operation is exactly the same, the explanation of the structure and operation will be omitted.

Next, to explain how to use it, the bolt carrying means 6
The horizontally elongated elevating member 71 of No.
When the cylinder/piston unit 85 shown in FIG. 5 is lowered to the lowering limit position as shown by the solid line in FIG. 7
1 onto the bolt support plate 73. The bolt B to be polished, which transfers onto the bolt support plate 73 and rolls downward in an inclined direction, comes into contact with the bolt elevating guide rail portion 44c of the bolt support plate 44 in the bolt temporary receiving means 42. In this state, when the horizontally elongated lifting member 71 is raised to the upper limit position shown by the solid line in FIG. In order to remove the bolt from the lifting guide rail portion 44c, the bolt rolls downward on the bolt support plate 73, moves onto the bolt support plate 44 of the bolt temporary receiving means 42 on the loading side, and comes into contact with the protrusion 44b at the lower end of the slope. It stops in that state.

On the other hand, the movable table 51 of the bolt transfer means 50 is moved by the cylinder/piston unit 52 to move the bolts while the lifting table 54 is lowered to its lower limit by the cylinder/piston unit 55 as shown by the imaginary line in FIG. Move it to the carry-in side travel limit. At this time, the bolt support stand 56 on the lifting table 54
is located at a position corresponding to the bolt temporary receiving means 42, and the bolt support plate 57 is located at a position corresponding to the bolt support means 1 (FIG. 3).

Once the bolts B to be polished are supported on each bolt support plate 44 of the bolt temporary receiving means 42 on the loading side as described above, the lifting table 54 in the bolt transfer means 50 is moved to the cylinder/piston unit 55.
The bolt B to be polished on the bolt support plate 44 is scooped up by a pair of V-shaped plates 56a on the bolt support base 56 on the lifting table 54.
Next, the movable base 51 of the bolt transfer means 50 is moved backward by the cylinder/piston unit 52 to the backward limit position shown by the solid line in FIG.
By lowering the cylinder/piston unit 55 to the lowering limit, the bolt support plate 56
The bolt B to be polished, which was supported above, is transferred onto the bolt supporting rollers 6a and 6b of the pair of left and right roller units 2 and 3 in the bolt supporting means 1, as shown in FIGS. 1 and 3. be done.

The height of the axial center of the bolt B to be polished supported by the bolt support means 1 is the same as that of each roller unit 2, 3.
The pair of movable bodies 5a, 5b in the handle 7
It can be arbitrarily adjusted by rotating the screw shafts 8 in forward and reverse directions to move them toward or away from each other, and by changing the distance between the front and rear pairs of bolt supporting rollers 6a and 6b. Further, the bolt positioning stopper 33 shown in FIG. Ball 37 is adjacent. Of course, at this time, the height of the elevating member 36 is adjusted by the screw shaft 40 with a handle so that the freely rotatable ball 37 faces the axial center position of the bolt B to be polished.

Next, each air motor unit 12a to 12c of the polishing means 9 shown in FIG. chain 2
0 by the handle 21 to move the transverse movement table 10 laterally to the side where the bolt B to be polished is located. The three rotating polishing brushes 13a that rotate in this way
13c is brought into sliding contact with the circumferential surface of the threaded shaft portion b1 at one end of the bolt B to be polished supported by the bolt support means 1 and moved at an appropriate speed in the bolt axial direction, thereby removing the threaded shaft portion b1 at one end of the bolt. Polish.
Of course, in this case, each polishing rotating brush 13a to 13
Each polishing rotating brush 13a is moved so that c slides into three places on the circumferential surface of the screw shaft portion b1 at one end of the bolt with equal pressure.
~ Adjust the position of 13c. That is, the rotary polishing brush 13a at the upper center is fixed at an appropriate height by moving the air motor unit 12a up and down by rotating the nut 28 with a handle in the forward and reverse direction while the nut 25 with a fixing handle is loosened. Tighten the nut 25 with handle to fix the air motor unit 12a. The polishing rotating brushes 13b and 13c on both sides of the lower part can be attached to the arms 23 and 24 by loosening the fixing handle nuts 29 and 30.
At the same time, the air motor units 12b and 12c are swung in the direction toward or away from each other,
With the interval between both polishing rotary brushes 13b and 13c adjusted, fixing nuts with handles 29 and 30 are removed.
All you have to do is conclude.

As mentioned above, one end of the threaded shaft part b of the bolt B to be polished is
Rotating polishing brushes 13a to 1 rotating around the circumferential surface of
3c is brought into sliding contact with an appropriate pressure, and the bolt B to be polished is held by the bolt at a circumferential speed that is moderately slower than the circumferential speed of the rotating polishing brushes 13a to 13c due to the frictional force between the rotating polishing brushes 13a to 13c. It rotates on both roller units 2 and 3 of means 1. Therefore, the bolt one end threaded shaft portion b1 is
Its entire circumferential surface is polished by rotating polishing brushes 13a to 13c. At this time, the bolt to be polished B
An axial thrust acts on the polishing means 9 in the moving direction, and there is a tendency for the bolt to be polished to skid in the axial direction on the bolt support means 1. This side-sliding is prevented by the other end surface of the polished bolt B coming into contact with the freely rotating ball 37 of the bolt positioning stopper 33. Of course, since the freely rotatable ball 37 is adjusted in position so as to come into contact with the axial center position of the other end of the bolt B to be polished, there is no fear of interfering with the rotation of the bolt B to be polished.

In addition, the control circuit is set so that the cylinder/piston units 52 and 55 of the bolt transfer means 50 cannot be operated while the air motor units 12a to 12c of the polishing means 9 are in operation. To avoid danger, it is desirable to perform an interlock. Further, although the polishing means 9 is configured to be manually reciprocated, it can also be configured to be mechanically reciprocated using a motor or a cylinder/piston unit.

After polishing the threaded shaft portion b1 at one end of the bolt B to be polished as described above, the rotating brush 13 for polishing is operated by the air motor units 12a to 12c.
The drives of a to 13c are stopped, the handle 21 is reversed, and the polishing means 9 is temporarily moved backward to the standby position shown in FIGS. 1 and 2. Then, the lift table 54 of the bolt transfer means 50 is raised to its upper limit by the cylinder/piston unit 55 again, and the bolt B to be polished on the bolt support means 1 is lifted by the bolt support table 56 as shown in FIG. . Next, by manually pushing the end of the bolt B to be polished on the bolt support 56 horizontally, the bolt B to be polished is moved along with the bolt support 56 into a vertical axis 60 with respect to the lifting table 54 (FIG. 6). Rotate horizontally around. At the start of this rotation, the ball 63a of the spring plunger 63 (FIG. 6), which has stopped the rotation of the bolt support 56, escapes from the recess 64a against the biasing force of the internal biasing spring. In this way, the bolt B to be polished is
Rotate 180 degrees and remove the spring plunger 63.
The ball 63a is placed in the recess 64 provided on the opposite side.
b is fitted with the biasing force of a spring, and the bolt support base 56 is elastically locked. As a result, the bolt B to be polished on the bolt support stand 56 has the other end threaded shaft portion b
2 is now facing the polishing means 9. In order to prevent the bolt B to be polished, which rotates horizontally together with the bolt support 56, from contacting the bolt support 57 on the same elevating table 54, the bolt support 57 is replaced with a bolt support as shown in FIG. It is configured to be slightly lower than 56.

After this, the lifting platform 54 of the bolt transfer means 50 is again
is lowered to the lowering limit, the bolt B to be polished is again transferred onto the bolt support means 1, and the polishing means 9 is operated as described above, whereby the threaded shaft portion b2 at the other end of the bolt to be polished B is similarly removed. Can be polished. During the polishing work of the threaded shaft portion b2 at the other end of this bolt,
The movable base 51 of the bolt transfer means 50 is moved to a cylinder.
The piston unit 52 is moved to the forward limit position shown by the imaginary line in FIG.
is displaced to a position directly below the bolt temporary receiving means 42 on the carry-in side, and the bolt support base 57 is also displaced to a position directly below the bolt B being polished.

When the polishing of the threaded shaft portions b1 and b2 at both ends of the bolt B to be polished is completed, the lifting platform 54 of the bolt transfer means 50 is raised again, and the polished bolt B on the bolt support means 1 is transferred to the bolt transfer means 50. Lift it up using the bolt support stand 57. Next, bolt transfer means 50
The movable base 51 of the cylinder/piston unit 5
2, the polished bolt B lifted by the bolt support stand 57 is moved horizontally to just above the bolt temporary receiving means 43 on the unloading side. After that, by lowering the bolt support base 57 together with the lifting base 54 to the lowering limit, the bolt support base 5
The polished bolts B on 7 are transferred onto each bolt support plate 45 in the bolt temporary receiving means 43.

The polished bolt B that has been transferred onto the bolt support plate 45 rolls downward, and as shown in FIG. It automatically moves onto the bolt support plate 74. Of course, the bolt support plate 45
The automatic opening/closing stopper 46 attached to the spring 49 (third
Since the bolt support plate 4 is lying down against the
5 onto the bolt support plate 74 is not obstructed.

In other words, the bolt transfer means 50 transfers the polished bolt B to the bolt temporary receiving means 4 on the unloading side.
3, if the horizontally elongated elevating member 72 of the bolt carrying means 66 is not in the bolt receiving position shown in FIG.
As shown in the figure, a spring 49 prevents the bolt B that has been transferred onto the bolt support plate 45 from rolling off the bolt support plate 45 in the upright position. When the horizontally elongated elevating member 72 of the bolt carrying means 66 rises to a predetermined bolt receiving position, the automatic opening/closing stopper 46 is automatically opened as described above, and the bolt B, which was stopped by this stopper 46, is moved up and down in the horizontally elongated manner. It rolls onto the bolt support plate 74 on the member 72 and moves onto it.

Further, as previously explained, the next bolt B to be polished is moved by the bolt carrying means 65 to each bolt support plate 44 in the bolt temporary receiving means 42 on the carrying side.
By supplying the polished bolts B to the temporary bolt receiving means 43 on the delivery side, the bolts to be polished B waiting on the temporary bolt receiving means 42 on the delivery side can be transferred. It can be transferred onto the bolt support means 1 using the bolt support stand 56 of the means 50.

Horizontally elongated lifting member 72 in bolt carrying means 66
Once the polished bolt B is carried out onto the bolt support plate 74, the horizontally elongated lifting member 72 is lowered to the floor by the lifting drive means 90 (FIG. 8), and the polished bolt B on the bolt support plate 74 is taken out. I can do it. At this time, as shown by the imaginary line in FIG. 5, the sleeper 97 whose upper surface is inclined is placed at an appropriate position on the floor surface, and the polished bolt B supported on the bolt support plate 74 of the horizontally elongated elevating member 72 is automatically moved. By moving the bolt from the top of the bolt support plate 74 to the sleeper 97, it is possible to save labor in carrying out the work.

In addition, when the length of the bolt to be polished changes as shown in the imaginary line B' of the bolt to be polished in each of FIGS. 1 to 3, the bolt positioning stopper 3
3 should be adjusted according to the end position of the bolt to be polished, and if the diameter of the bolt to be polished changes, the bolts of each roller unit 2, 3 in the bolt support means 1 may be adjusted. Support roller 6
a, 6b, the position of each polishing rotary brush 13a to 13c (air motor unit 12a to 12c) in the polishing means 9, and the height of the freely rotating ball 37 in the bolt positioning stopper 33, respectively. Just adjust it according to the diameter of the bolt to be polished. In the bolt support means 1 shown in the embodiment,
Since the bolt supporting rollers 6a and 6b are moved horizontally to change the interval, when the diameter of the bolt to be polished changes, the height of the bolt axis remains constant even if the interval between the rollers 6a and 6b is changed. I can't keep it. Therefore, the height of the freely rotatable ball 37 of the bolt positioning stopper 33 is configured to be changeable, and the bolt supporting rollers 6a, 6b are adjusted in the far and near directions relative to the axis of the bolt to be polished, which is located at a constant height. If the bolts are configured to move toward and away from each other in conjunction with each other (diagonally up and down), the bolt to be polished can be supported with its axis always kept at a constant height regardless of its diameter.

Further, each polishing rotating brush 1 in the polishing means 9
Although the bolt B to be polished is caused to rotate by the contact rotation of the bolts 3a to 13c, at least one of the bolt supporting rollers 6a and 6b of each roller unit 2 and 3 in the bolt supporting means 1 is forcibly driven. It is also possible to provide a motor and configure the bolt B to be polished to be forcibly rotated by this drive roller.

Although the bolt support stand 57 located on the carry-out side may be configured to be pivotable, it is better to configure the bolt support stand 56 on the carry-in side to be pivotable as in the embodiment.
This is preferable considering the work procedure. Of course, depending on the case, both the bolt supports 56 and 57 may be configured to be rotatable. It is also possible to use a motor or a cylinder/piston unit that drives the rotatable bolt support base to rotate the bolt to be polished, so that the direction of the bolt to be polished is reversed by mechanical force.

The work of supplying and unloading the bolts to be polished to the bolt temporary receiving means provided on each of the loading and unloading sides can be carried out using a hoist, a manipulator, or a forklift using an appropriate attachment, but this is not particularly shown in the embodiment. When such bolt loading means 65 and bolt unloading means 66 are installed together, not only can they be used more conveniently, but also these means 65, 66, polishing means 9, bolt transfer means 50, etc. can be connected to a microcomputer or a sequence circuit. It is also possible to make the polishing work unmanned by making the polishing work fully automatic and linked.

(Operations and Effects of the Invention) According to the bolt polishing device of the present invention that can be implemented and used as described above, the bolt to be polished can be transferred (loaded) to the polishing action position (bolt support means 1) and the polishing action can be performed. The polished bolt can be taken out (unloaded) from the position at the same time, and in the polishing position (bolt support means 1), the tip screw shaft of the supported bolt is mechanically polished by the polishing means. Compared to traditional manual methods,
It is possible to significantly improve work efficiency and save labor, and in particular, according to the configuration of the present invention, the following unique effects can be expected.

That is, while transferring the bolt on the bolt temporary receiving means on the carry-in side onto the bolt supporting means,
Bolt transfer means for transferring the polished bolts on the bolt support means onto the bolt temporary reception means on the carry-out side are arranged in the front and rear directions at an interval substantially equal to the interval between the bolt support means and each bolt temporary reception means. A pair of front and rear bolt supports arranged in parallel in the direction, and a lifting drive means for raising and lowering both of these bolt supports together between a high level and a low level with respect to the support level of the bolt temporary receiving means and the bolt supporting means. and a position where both the bolt supports correspond to the temporary bolt receiving means and the bolt supporting means on the carry-in side, and a position where both the bolt supports correspond to the bolt supporting means and the temporary bolt receiving means on the carry-out side. and a back-and-forth drive means for integrally reciprocating between the two bolt supports, so that both the bolt supports can be raised together to a high level and the bolts to be polished on the temporary bolt receiving stand on the loading side and By simultaneously lifting the polished bolt on the bolt support means at the polishing position and then moving both of the bolt supports together forward by a predetermined stroke, the bolt to be polished is conveyed to the polishing position and the polished bolt is simultaneously lifted. The bolt to be polished is transported to a position above the temporary bolt receiving stand on the unloading side, and then both the bolt supporting stands are lowered together to a low level, so that the bolt to be polished is placed on the bolt holding means at the polishing position. At the same time as unloading, the polished bolt can be lowered onto the bolt temporary receiving stand on the unloading side. Finally, by moving both bolt supports together backwards by a predetermined stroke, preparation for the next conveyance is completed.

According to the configuration of the present invention, the bolt conveying means for loading and unloading can be composed of two bolt supports, one elevating drive means and one longitudinal drive means,
Compared to using a conventional workpiece conveyance means that intermittently feeds the workpiece at regular intervals on a circular endless conveyance path, or a workpiece conveyance means that uses both a manipulator dedicated to loading and a manipulator dedicated to unloading, the loading speed is reduced. The space occupied by the unloading means can be made very small, and costs can be reduced.

Furthermore, according to the configuration of the present invention, at least one of the pair of front and rear bolt supports is configured to be able to rotate within a range of at least 180 degrees around the vertical axis, so that the bolt support In the case of a bolt that has a means for polishing the bolt end threaded shaft on only one side of the means, but has threaded shafts to be polished at both ends, the polishing of the threaded shaft on one end side is completed. Then, using the pivotable bolt support, lift the bolt with one end polished on the bolt support means and turn it 180 degrees,
The bolt can be lowered onto the bolt support means again, and the unpolished screw shaft portion at the other end can be polished by the polishing means.

That is, without disposing respective polishing means on both sides of the bolt support means, it is possible to sequentially polish both end threaded shaft portions of a bolt having threaded shaft portions to be polished at both ends with one polishing means. Compared to the case where polishing means are provided on both sides of the bolt support means, the entire apparatus can be made smaller and simpler, and the cost can be significantly reduced.

Of course, if the step of reversing the direction of the bolt using a pivotable bolt support is omitted, the present invention can also be used without any problem in polishing a normal bolt having a threaded shaft portion at only one end.

[Brief explanation of the drawing]

Figure 1 is a partially cross-sectional plan view, Figure 2 is a partially vertical front view (bolt loading/unloading means is omitted), Figures 3 to 5 are vertical side views of each part, and Figure 6 is a rotating view. A longitudinal side view showing the support structure of the bolt support base,
FIG. 7 is a cross-sectional plan view of the same, and FIG. 8 is a cross-sectional plan view showing the elevating and lowering driving means of the bolt loading/unloading means. DESCRIPTION OF SYMBOLS 1... Bolt support means, 2, 3... Roller unit, 4, 34, 81a, 81b... Slide guide, 5a, 5b, 82a, 82b, 86... Movable body, 6a, 6b... Bolt support roller, 8, 4
0... Screw shaft with handle, 9... Polishing means, 10... Lateral moving table, 11... Lateral moving table driving means, 12a to 12c...
Air motor unit, 13a-13b... Rotating polishing brush, 14, 58... Guide rail, 15,
59, 69, 70...Guide wheel, 18, 19
...Tooth ring, 21...A handle for rotating the tooth wheel 19, 22
... Bracket that can be raised and lowered, 23, 24 ... Arm that can be swung and fixed, 25, 29, 30, 39 ... Nut (or bolt) with fixing handle, 33 ... Stopper for bolt positioning, 35, 51 ... Movable base, 3
6... Lifting member, 37... Freely rotating ball, 41a,
41b... Bolt guide, 42, 43... Bolt temporary receiving means, 44, 45, 73, 74... Bolt support plate, 46... Automatic opening/closing stopper, 48... Arm with roller, 49, 83a, 83b... Spring, 50... Bolt transfer Loading means, 52, 55, 8
5,94...Cylinder/piston unit, 53
... Lifting rod, 54... Lifting table, 56, 57... Pair of front and rear bolt supports, 56a, 57a... V-shaped plate,
63...Spring plunger for preventing rotation, 64
a, 64b... Ball fitting recess, 65... Bolt carrying-in means, 66... Bolt carrying-out means, 67, 68... Lifting guide column, 71, 72... Horizontally elongated lifting member, 75
a, 75b, 91a, 91b...Elevating drive wire, 76a, 76b, 77a, 77b...Horizontal axis sheave, 78a, 78b...Vertical axis sheave, 79a,
79b, 87a, 87b...Movable vertical shaft sheave, 8
0a, 80b, 88a, 88b...Wire end locking fittings, 84a, 84b, 93a, 93b...Wire, 89, 90...Elevating and lowering drive means for horizontally elongated elevating members 71, 72, B...Bolt to be polished, F...Base.

Claims (1)

[Scope of Claims] 1. A bolt polishing device in which polishing means for a threaded shaft portion of a bolt end is disposed on one side in the axial direction of a bolt to be polished that is rotatably supported on a bolt support means, comprising: Temporary bolt receiving means are disposed on the support means at symmetrical positions on both sides of the support means in the longitudinal direction orthogonal to the bolt axial direction, and the bolts on the temporary bolt receiving means on the loading side are supported by the bolts. In a bolt polishing apparatus, a bolt transfer means is provided for transferring the polished bolt on the bolt support means and transferring the polished bolt on the bolt temporary receiving means on the unloading side. The means includes: a pair of front and rear bolt supports arranged in parallel in the front-rear direction at intervals substantially equal to the spacing between the bolt support means and each temporary bolt support means; an elevating drive means for raising and lowering the means and the bolt support means together between a high level and a low level with respect to the support level; and a lifting drive means for raising and lowering the bolt support means at a position corresponding to the bolt temporary receiving means and the bolt support means on the carry-in side. and a forward and backward drive means for integrally reciprocating both the bolt supports between positions corresponding to the bolt support means and the temporary bolt receiving means on the unloading side, the pair of front and rear bolt supports A bolt polishing device characterized in that at least one of the bolt supports is configured to be able to rotate within a range of at least 180° around a vertical axis. 2. The apparatus according to claim 1, wherein a bolt positioning stopper is provided on the opposite side of the bolt supporting means from the side where the polishing means is located, and the bolt positioning stopper comes into contact with the end surface of the supported bolt to be polished. . 3. The device according to claim 1 or 2, further comprising means for elastically stopping the pivotable bolt support at positions before and after the 180° pivot.