JP2009291868A - Heavy weight positioning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein a manufacturing line is stopped due to the damage of a heavy weight mounting part caused by colliding with an upper part of a cylindrical standard pin part during fitting in a conventional heavy weight positioning device. <P>SOLUTION: A heavy weight positioning device comprises a base 1, a standard positioning part 2, and a heavy weight mounting part 3. The standard positioning part 2 has a base mounting part 20 which is mounted on the base 1, a center bar-like body 21 which is erected perpendicularly to the base mounting part 20, an elastic body 22 arranged around the center bar-like body 21 and vertically extended and contracted, a pressing plate 23 positioned at the upper part of the elastic body 22, and a plurality of links 25 arranged between the pressing plate 23 and the base mounting part 20 and having folding pressing parts 24 folded radially outward. The heavy weight mounting part 3 has a mounting part 30 and a boss part 33 having a cylindrical boss hole 32 with an opening at a lower surface 31. The boss hole 32 has a pressing surface 34 parallel with the lower surface 31 in a middle part in a depth direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a heavy article positioning device used for positioning heavy parts such as parts, tools, and molds attached to an automobile body or the like conveyed by a conveyor or the like at a work position to which they are attached.

  In a manufacturing plant such as an automobile, the parts and tools attached to the automobile body etc. conveyed by the conveyor are appropriately changed according to the difference in the type of car being conveyed, so that the heavy article positioning as shown in the sectional view in FIG. It is placed on the heavy object mounting part 300 of the apparatus, suspended by a moving crane or the like in the factory, moved to the base part 100 and the reference pin part 200 placed at a necessary place, and lowered to the reference pin part. Positioning was performed by fitting to 200, and necessary parts and tools were replaced.

  A conventional heavy object positioning device includes a base part 100 made of a plate-like body, a cylindrical reference pin part 200 fixedly provided on the base part 100 and erected in a vertical direction, and the reference pin part 200. It consists of a heavy article placement unit 300 that moves down in the air and fits and locates.

  Moreover, the conventional reference | standard pin part 200 consists of a column-shaped body provided so that it may protrude upwards in the center of the base part 100 which consists of a plate-shaped body provided in an installation location, as it shows as sectional drawing in FIG. The reference pin 200 was formed in a conical shape so that the upper part of the cylindrical body could be easily fitted.

  Similarly, the conventional heavy article placement unit 300 includes a boss part 302 having a cylindrical boss hole 301 provided with an opening on the lower surface, and a placement plate 303 provided on the upper part of the boss part 302 to place a heavy article. It consists of. The cylindrical inner diameter of the boss hole 301 is formed to be the same as or slightly larger than the outer diameter of the cylindrical body so that it can be fitted in contact with the outer peripheral surface of the cylindrical body of the reference pin portion 200.

  The total weight of the heavy article placement unit 200 on which parts, tools, molds, and the like are placed is about 1.5 to 2.0 tons.

  When the boss hole 301 is to be fitted to the conventional reference pin portion 200 shown in FIG. 5, the heavy-weight placing portion 200 having a total weight of 1.5 tons or more suspended from a moving crane or the like has a cylindrical shape. There is a problem that the upper part of the reference pin portion 200 is likely to hit (occurrence of galling), breakage of each, or a component or tool that has been dropped, causing the production line to stop and the like. there were.

  In addition, since the outer diameter of the cylindrical body of the conventional reference pin portion 200 and the inner diameter of the cylinder of the boss hole 301 are substantially equal, there is a problem that mutual wear is severe and the life is short due to the up and down contact.

In order to solve the above problem, a heavy article positioning apparatus having a base part, a reference positioning part, and a heavy article placing part,
The base part consists of a plate-shaped body,
The reference positioning part includes a base part attaching part attached to the base part, a central bar-like body standing upright in the base part attaching part, an elastic body provided around the central bar-like body and capable of extending vertically A plate-like body located above the elastic body and having a through hole penetrating the central rod-shaped body, and provided between the pressure plate and the base mounting portion, bends radially outward about the central rod-shaped body. A link portion comprising a plurality of links provided with a bending pressing portion,
The heavy object placement part has a placement part on which a heavy object can be placed, and a boss part having a cylindrical boss hole provided with an opening part on at least the lower surface, and the boss hole is located at an intermediate part in the depth direction. It forms a pressing surface parallel to the lower surface,
When the heavy load placing portion descends from above and fits into the reference positioning portion, the pressing surface of the heavy load placing portion presses the pressing plate of the reference positioning portion and shortens the elastic body. A heavy article positioning device is proposed, in which each link pressing part is moved radially outward from the central rod-shaped body at equal intervals and brought into contact with the inner surface of the boss hole of the heavy article placing part. To do.

  In addition, the heavy load placing portion is composed of a lower cylindrical portion with a large inner diameter at the bottom and an upper cylindrical portion with a small inner diameter at the top, and a step surface between the lower cylindrical portion and the upper cylindrical portion as a pressing surface. A heavy article positioning device described in column 0009, which is a formed boss hole, is proposed.

  Further, the reference positioning unit is configured so that the bent pressing portion of each link has a weight when the lower surface of the heavy load placing portion is in contact with the base surface due to the lowering of the pressing surface by the heavy load placing portion. A heavy article positioning device described in the 0009 column or the 0010 column, which is a reference positioning unit that contacts the inner surface of the boss hole of the article placement unit, is proposed.

  Furthermore, as the reference positioning unit, the heavy article positioning device described in the 0009 column, the 0010 column, or the 0011 column, which is a reference positioning unit in which the bending pressing unit of each link is a rotatable roller, is proposed.

  According to this invention, when the heavy load placing portion descends from above and fits into the reference positioning portion, the pressing surface of the heavy load placing portion presses the pressing plate of the reference positioning portion downward. By contracting the elastic body and bending a plurality of link portions, each bending pressing portion is moved radially outward from the central rod-like body at equal intervals and brought into contact with the inner surface of the boss hole of the heavy-weight placing portion. The inner surface of the boss hole of the heavy article mounting portion can be positioned at equal intervals around the central rod-shaped body of the reference positioning portion. Therefore, the damage of the reference positioning part due to the heavy object placing part having a very heavy total weight is reduced, the stop of the production line is reduced, and the working efficiency is improved.

  Further, since the inner surface of the boss hole hardly contacts the reference positioning portion as in the case where the conventional reference pin portion 200 and the boss hole 301 are fitted, wear due to contact is reduced.

  Furthermore, when the heavy load placing part descends from above and presses the pressing plate of the reference positioning part downward, the upward biasing force of the elastic body acts as a cushion, and the descending speed is reduced. Improved safety.

  Further, when the bending pressing portion is composed of a rotatable rotating roller as in the invention according to claim 4, when sliding in contact with the inner surface of the boss hole of the heavy load placing portion, the contact movement is possible without causing friction. Therefore, there is an effect that there is little damage to each other's members.

  It is front sectional explanatory drawing which shows the heavy article positioning device which is embodiment of this invention, FIG. 1 thru | or FIG. 3 with which a heavy article mounting part descend | falls one by one and fits into a reference positioning part, and the plane of a reference | standard positioning part are shown. This will be described with reference to FIG.

  The heavy article positioning device according to the embodiment of the present invention includes a base part 1, a reference positioning part 2, and a heavy article placing part 3.

  The base portion 1 is made of a movable plate-like body, and a reference positioning portion 2 is provided at the approximate center of the upper surface thereof.

  The reference positioning portion 2 includes a base portion mounting portion 20 that is a plate-like body, a central rod-like body 21 that is erected in a direction perpendicular to the base portion attaching portion 20, and a central rod-like body 21 that is provided around the central rod-like body 21. An elastic body 22 that can be expanded and contracted vertically, a pressing plate 23 that is a plate-like body that is fixed to the upper portion of the elastic body 22 and penetrates the central rod-like body 21, and the pressing plate 23 and the base portion mounting portion 20 In this embodiment, a plurality of link portions 25 each including four links 25 a, 25 b, 25 c, and 25 d are provided.

  The base portion mounting portion 20 is fixed to the approximate center of the base portion 1 with a bolt or the like. A central rod-like body 21 is erected in the vertical direction substantially at the center of the base portion mounting portion 20. The central rod-shaped body 21 may be a rod-shaped body made of a thin cylindrical body or a prismatic body, and a plate-shaped stop plate 21a is provided at the upper end. The stop plate 21 a is a circular plate-like body, and may have a diameter larger than the diameter of the through hole at the center of the pressing plate 23.

  An elastic body 22 made of a steel spring is provided around the central bar 21. The elastic body 22 is fixed to the base portion mounting portion 20 at the lower end, and a pressing plate 23 is attached to the upper end, and is provided so as to be vertically extendable with respect to the central rod-shaped body 21.

  The pressing plate 23 is a circular plate-like body, and a through hole is provided at the center, and the central rod-like body 21 is passed through the through hole. The pressing plate 23 is attached to the lower surface by joining a link mounting plate 26 which is a circular plate having a slightly smaller diameter. Similarly to the pressing plate 23, the link mounting plate 26 is provided with a through hole in the center, and the central bar 21 is passed through the through hole. The upper ends of the link portions 25 provided at equal intervals at three or more locations around the link mounting plate 26 are connected. In this embodiment, the link portion 25 is attached to the lower surface of the pressing plate 23 via a link mounting plate 26 which is a small-diameter circular plate. However, in other embodiments, the upper end of the link portion 25 is directly connected to the pressing plate 23. The structure attached to the lower surface of may be sufficient.

  The pressing plate 23 is urged upward by the urging force of the elastic body 22, but abuts against a stop plate 21 a provided in the state of the central rod 21 and does not move further upward.

  In this embodiment, the link portion 25 composed of the four bendable links 25a, 25b, 25c, and 25d is attached to the circumferential portion of the link mounting plate 26 whose upper end is fixed to the lower surface of the pressing plate 23, A lower end is attached to the circumferential part of the base part attaching part 20, and each link 25 includes a bending pressing part 24 that bends radially outward around the central bar 21. The four links 25a, 25b, 25c, and 25d are provided at equal intervals in the circumferential portion or in the vicinity of the circumference of the link mounting plate 26 and the base mounting portion 20 that are circular plates. The number of links in the link unit 25 may be three or more.

  Each of the links 25a, 25b, 25c, and 25d is rotatably attached to the link attachment plate 26 and the base attachment portion 20, and is provided with a bending pressing portion 24 that can be bent and rotated at an intermediate position in the length direction. The bending pressing portion 24 is composed of a rotatable rotating roller, and the rotating roller surface is provided as a circumferential tangent surface with the central rod 21 as the center. The bending pressing portion 24 is a heavy load placement portion in which the links 25a, 25b, 25c, and 25d are bent radially outwardly around the central rod-shaped body 21 as the links 25a, 25b, 25c, and 25d are lowered. It can rotate in contact with the inner surface of the three boss holes 32.

  The heavy article placement unit 3 includes a placement part 30 on which a heavy article can be placed, and a boss part 33 having a cylindrical boss hole 32 provided with an opening on at least the lower surface 31. A pressing surface 34 parallel to the lower surface is formed in the intermediate portion in the depth direction.

  The boss hole 32 of the heavy load placement unit 3 includes a lower cylindrical portion 32a having a large inner diameter on the lower side and an upper cylindrical portion 32b having a smaller inner diameter on the upper side, and has a step surface between the lower cylindrical portion 32a and the upper cylindrical portion 32b. The pressing surface 34 is formed.

  Next, the operation of the heavy article positioning device according to the embodiment of the present invention will be described. In FIG. 1, the heavy load placing unit 3 is suspended by a moving crane (not shown) with parts and tools (not shown) placed on the placing unit 30 and conveyed to a place where the reference positioning unit 2 is located. And the state which descends from the upper part is shown.

  FIG. 2 shows a state in which the heavy article placing unit 3 is further lowered from FIG. 1 and the pressing surface 34 of the heavy article placing unit 3 is in contact with the pressing plate 23 of the reference positioning unit 2.

  The heavy load placing portion 3 further descends from FIG. 2 against the upward biasing force of the elastic body 22 that is a spring by its own weight, and the pressing surface 34 of the heavy load placing portion 3 is the reference positioning portion 2. The pressing plate 23 is pressed to shorten the elastic body 22, and the four links 25 a, 25 b, 25 c, and 25 d are bent outwardly from the bending pressing portions 24 and moved from the central rod-shaped body 21 at equal intervals. For this reason, even if the center of the boss hole 32 descends while slightly deviating from the central rod-like body 21, the position is easily corrected because it hits some of the bent pressing portions 24.

  Further, as shown in FIG. 3, when the lower surface 31 of the heavy load placing portion 3 comes into contact with the upper surface of the base portion 1, each of the links 25a, 25b, 25c, 25d of the reference positioning portion 2 is bent. The pressing part 24 comes into contact with the inner peripheral surface of the lower cylindrical part 32 a of the boss hole 32 of the heavy article placing part 3. When each bending pressing part 24 contacts and slides on the inner peripheral surface of the lower cylindrical part 32a of the boss hole 32, the rotating roller rotates. Accordingly, since the central bar 21 of the reference positioning portion 2 is positioned at the center of the boss hole 32, the heavy article placement portion 3 can be set at the center of the reference positioning portion 2.

  The present invention is used as a positioning device for moving heavy objects such as parts and tools provided in the vicinity of a production line such as an automobile to a predetermined reference position.

Front cross-sectional explanatory diagram of a heavy article positioning device according to an embodiment of the present invention It is front sectional explanatory drawing of a heavy article positioning device similarly, and is a figure of the state which descended from FIG. 1 and the pressing surface of the heavy article mounting part contacted the pressing plate of the reference | standard positioning part. Similarly, it is front sectional explanatory drawing of a heavy article positioning apparatus, and is the figure of the state which descended further from FIG. 2, and the lower surface of the heavy article mounting part contacted the upper surface of the base part Plane explanatory drawing of the reference | standard positioning part of the heavy article positioning device which is embodiment of this invention Front cross-sectional explanatory diagram of a conventional heavy article positioning device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base part 2 Reference | standard positioning part 20 Base part attachment part 21 Central rod-shaped body 21a Stop plate
22 Elastic body 23 Pressing plate 24 Bending pressing part (rotating roller)
25 Link portion 25a, 25b, 25c, 25d Link 26 Link mounting plate 3 Heavy object placement portion 30 Placement portion 31 Lower surface 32 Boss hole
32a Lower cylindrical part
32b Upper cylindrical portion 33 Boss portion 34 Press surface

Claims (4)

A heavy article positioning device having a base part, a reference positioning part, and a heavy article placing part,
The base part consists of a plate-shaped body,
The reference positioning part includes a base part attaching part attached to the base part, a central bar-like body standing upright in the base part attaching part, an elastic body provided around the central bar-like body and capable of extending vertically A plate-like body located above the elastic body and having a through hole penetrating the central rod-shaped body, and provided between the pressure plate and the base mounting portion, bends radially outward about the central rod-shaped body. A link portion comprising a plurality of links provided with a bending pressing portion,
The heavy object placement part has a placement part on which a heavy object can be placed, and a boss part having a cylindrical boss hole provided with an opening part on at least the lower surface, and the boss hole is located at an intermediate part in the depth direction. It forms a pressing surface parallel to the lower surface,
When the heavy load placing portion descends from above and fits into the reference positioning portion, the pressing surface of the heavy load placing portion presses the pressing plate of the reference positioning portion and shortens the elastic body. A heavy article positioning device characterized in that each of the bent pressing portions is moved radially outward from the central rod-like body at equal intervals and brought into contact with the inner surface of the boss hole of the heavy article placing portion.   The heavy load placing portion is composed of a lower cylindrical portion with a large inner diameter at the bottom and an upper cylindrical portion with a small inner diameter at the top, and a step surface between the lower cylindrical portion and the upper cylindrical portion is formed as a pressing surface. The heavy article positioning device according to claim 1, wherein the heavy article positioning device is a boss hole.   The reference positioning unit is configured such that when the lower surface of the heavy load placing unit comes into contact with the surface of the base unit due to the lowering of the pressing surface by the heavy load placing unit, the bent pressing portion of each link is loaded with the heavy load. The heavy article positioning device according to claim 1, wherein the heavy article positioning device is a reference positioning portion that contacts the inner surface of the boss hole of the mounting portion.   4. The heavy article positioning device according to claim 1, wherein the reference pressing portion is a reference positioning portion formed of a rotatable roller in which a bending pressing portion of each link is rotatable.

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