JPH0527370Y2 - - Google Patents
Info
- Publication number
- JPH0527370Y2 JPH0527370Y2 JP1987036194U JP3619487U JPH0527370Y2 JP H0527370 Y2 JPH0527370 Y2 JP H0527370Y2 JP 1987036194 U JP1987036194 U JP 1987036194U JP 3619487 U JP3619487 U JP 3619487U JP H0527370 Y2 JPH0527370 Y2 JP H0527370Y2
- Authority
- JP
- Japan
- Prior art keywords
- ball
- air
- pedestal
- air chamber
- pressurized air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 22
- 238000004891 communication Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Rollers For Roller Conveyors For Transfer (AREA)
Description
【考案の詳細な説明】
〔考案の目的〕
（産業上の利用分野）
本考案は、上面に載置される物品を小さい抵抗
で移動自在に支持する支持装置にかかり、特に回
転体にボールを用いた物品搬送用回転支持装置に
関する。[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention relates to a support device that movably supports an article placed on an upper surface with small resistance. The present invention relates to a rotation support device for transporting articles.
（従来の技術）
例えば自動プレス機械等において、ワークであ
る鋼板を所定の工程にしたがつて順次加工する場
合、そのワークを急速に移動させて次の加工位置
をプレス機械の加工部に位置付けする必要があ
る。(Prior art) For example, in an automatic press machine, etc., when a steel plate as a workpiece is sequentially processed according to a predetermined process, the workpiece is rapidly moved and the next processing position is located in the processing section of the press machine. There is a need.
上記のような機械の場合、ワークの迅速な移動
を可能にするため、ベツドの上面に回転支持装置
を配設し、この回転支持装置でワークを受け、ワ
ークの移動時の抵抗を減少して速やかに加工位置
を機械の加工部へ移動させるようになされてい
る。 In the case of the above-mentioned machines, in order to enable rapid movement of the workpiece, a rotational support device is installed on the top surface of the bed, and this rotational support device receives the workpiece, reducing resistance when moving the workpiece. The processing position is quickly moved to the processing section of the machine.
上記の回転支持装置は、ワークのあらゆる方向
への移動に対応させるため、一般に回転体として
ボールが用いられ、特にこのボールとそのボール
受皿面との間における摩擦抵抗を減少させるため
にボール受皿面に圧力エアを吹出させ、このエア
圧によりボールを浮動支持する構造とされた回転
支持装置が用いられている。そしてこのエア圧に
より良好に浮動させるうえから、中空のボールが
用いられている。 In order to support the movement of the workpiece in all directions, the above-mentioned rotational support device generally uses a ball as a rotating body, and in particular, in order to reduce the frictional resistance between the ball and the ball tray surface, the rotation support device uses a ball as the rotating body. A rotary support device is used that has a structure in which pressurized air is blown out from the ball and the ball is supported in a floating manner using the air pressure. A hollow ball is used because the air pressure allows the ball to float properly.
しかして従来の中空ボールを用いた回転支持装
置は、第６図に示すように、ボールを保持する凹
球面状のボール受皿面ａに0.3φ程度の多数の微細
小孔ｂ，ｂ……を穿設し、これら微細小孔ｂ，ｂ
……から圧力エアを噴出させ、これら微細小孔
ｂ，ｂ……から噴出する圧力エアによりボールを
浮動状態に支持するようになされていた。 However, as shown in Fig. 6, the conventional rotary support device using hollow balls has a large number of minute holes b, b, etc. of about 0.3φ in the concave spherical ball receiving tray surface a that holds the balls. These minute holes b, b
. . . Pressure air is blown out from these minute holes b, b .
（考案が解決しようとする問題点）
しかるに上記従来のボールの支持手段では、ボ
ール受皿面ａに多数の微細小孔ｂ，ｂ……を穿設
する必要があるため、その製作が容易でなく、製
造コストが嵩むという欠点があるばかりでなく、
微細小孔ｂ，ｂ……に微細な切粉や粉塵が詰りや
すく、これにより噴出する圧力エアの分布が偏つ
てボールが中立正常姿勢に保持されなくなり、ボ
ールの自由回転時にボールの一部がボール受皿面
ａに接触してワークの迅速移動に追従し得なくな
ることからボールとワークとの間に擦れが生じ、
ワークが磨き鋼板や塗装鋼板である場合にはこれ
にすり傷を付けてしまうという不具合をもたらし
やすい問題点があつた。(Problems to be Solved by the Invention) However, with the conventional ball supporting means described above, it is not easy to manufacture because it is necessary to drill a large number of small holes b, b, etc. in the ball receiving tray surface a. , not only has the drawback of increasing manufacturing costs, but also
The small holes b, b... are easily clogged with fine chips and dust, which biases the distribution of the ejected pressurized air and prevents the ball from being held in a neutral normal posture, causing part of the ball to become loose when it rotates freely. Since the ball contacts the tray surface a and cannot follow the rapid movement of the workpiece, friction occurs between the ball and the workpiece.
When the workpiece is a polished steel plate or a painted steel plate, there is a problem in that it tends to cause scratches on the workpiece.
本考案はこれに鑑み、製造が容易でかつボール
を大きな力で確実に浮動支持することができる物
品搬送用回転支持装置を提供することを目的とし
てなされたものである。 In view of this, the present invention was devised for the purpose of providing a rotating support device for transporting articles that is easy to manufacture and can reliably support balls in a floating manner with a large force.
（問題点を解決するための手段）
上記従来技術の問題点を解決するため、本考案
においては、台座と、この台座の上部台座に気密
を保持して昇降可能に設けられ上面に中空状のボ
ールの下半部を保持する凹球面状のボール受皿面
が形成された受皿部材を有するピストン部材と、
前記受皿部材の下面と下部台座との間に気密に形
成されたエア室と、下部台座に設けられ前記エア
室内に連通する圧力エア給排孔と、前記受皿部材
のボール受皿面の中心部に開口し前記エア室に連
通するエア連通孔と、前記ボール受皿面にその中
心部から等角配置に放射方向に所要長さを有して
刻設された複数条のエア通溝とを備え、前記圧力
エア給排孔を通じて供給される圧力エアによりピ
ストン部材を上昇させるとともにボール受皿面と
ボールとの間にエア膜を形成し、このエア膜によ
りボールをボール受皿面内で浮動支持するように
したことを特徴とする。
(Means for Solving the Problems) In order to solve the above-mentioned problems of the prior art, the present invention includes a pedestal, and an upper pedestal of the pedestal, which is provided with a hollow shape on the upper surface so as to be movable up and down while maintaining airtightness. a piston member having a saucer member formed with a concave spherical ball tray surface that holds the lower half of the ball;
an air chamber airtightly formed between the lower surface of the saucer member and the lower pedestal, a pressurized air supply/discharge hole provided in the lower pedestal and communicating with the air chamber, and a center portion of the ball tray surface of the saucer member. an air communication hole that opens and communicates with the air chamber; and a plurality of air communication grooves that are formed on the surface of the ball tray in an equiangular arrangement from the center thereof and have a required length in the radial direction; The piston member is raised by the pressurized air supplied through the pressure air supply/discharge hole, and an air film is formed between the ball receiver surface and the ball, and the ball is supported floating within the ball receiver surface by this air film. It is characterized by what it did.
（作用）
上記のように構成したことにより、圧力エア給
排孔を通じて供給される圧力エアがピストン部材
の下面に作用してピストン部材を押し上げ、ボー
ルの上面を上昇させて被搬送物品を支えるととも
に、その圧力エアがエア連通孔を通じてボール受
皿面に形成されているエア通溝に流れ込み、この
圧力エアがエア通溝の末端および両側からボール
とボール受皿面との間に流出してその間部分にエ
ア膜を形成し、このエア膜によりボールは均圧で
浮動支持され、僅かの外力によつても自由回転し
得る浮動状態に支持される。(Function) With the above configuration, the pressurized air supplied through the pressure air supply/discharge hole acts on the lower surface of the piston member, pushes it up, raises the upper surface of the ball, and supports the transported article. The pressurized air flows into the air groove formed on the ball tray surface through the air communication hole, and this pressurized air flows out between the ball and the ball tray surface from the end and both sides of the air groove, and flows into the area between them. An air film is formed, and the ball is supported in a floating state under equal pressure by this air film, and is supported in a floating state in which it can freely rotate even with a slight external force.
（実施例）
以下、本考案を第１図ないし第５図に示す実施
例を参照して説明する。(Embodiments) The present invention will be described below with reference to embodiments shown in FIGS. 1 to 5.
第１図は本考案による物品搬送用回転支持装置
１の一実施例の平面を示し、第２図は第１図の
−線における縦断側面を示し、さらに第３図は
ピストン部材が押し上げられた状態の縦断側面を
示している。 FIG. 1 shows a plan view of an embodiment of the rotary support device 1 for conveying articles according to the present invention, FIG. 2 shows a longitudinal side view taken along the line - in FIG. 1, and FIG. 3 shows a state in which the piston member is pushed up. It shows the longitudinal aspect of the state.
上記の回転支持装置１は、適用対象となる機械
装置のベツドに固定するための台座２を有し、こ
の実施例では、台座２は円盤状の下部台座２Ａ
と、この下部台座２Ａにボルト３により剛結され
る円環状の上部台座２Ｂとからなつており、そし
て上記上部台座２Ｂの中央孔内にピストン部材４
が内挿され、物品搬送面を圧力エアにより上下方
向に可変となるように構成されている。 The above rotation support device 1 has a pedestal 2 for fixing to the bed of a mechanical device to which it is applied, and in this embodiment, the pedestal 2 is a disk-shaped lower pedestal 2A.
and an annular upper pedestal 2B rigidly connected to the lower pedestal 2A with bolts 3, and a piston member 4 is disposed in the center hole of the upper pedestal 2B.
is inserted, and the article conveying surface is configured to be vertically variable using pressurized air.
このピストン部材４は、図示の実施例において
は外筒部材５と、この外筒部材５内に軸方向に密
嵌された受皿部材６とで構成されており、この受
皿部材６は、外筒部材５の内周下方部に嵌着され
た止リング７により抜止めされているとともにＯ
リング８により気密性が保たれている。 In the illustrated embodiment, the piston member 4 is composed of an outer cylinder member 5 and a saucer member 6 that is tightly fitted in the outer cylinder member 5 in the axial direction. The member 5 is prevented from coming off by a retaining ring 7 fitted on the lower part of the inner circumference, and the O
Airtightness is maintained by the ring 8.
前記外筒部材５の外周に穿設された鍔状部５Ａ
と上部台座２Ｂとの間には圧縮コイルバネ９が内
装され、このバネ９により外筒部材５を常に下方
へ付勢している。また外筒部材５の外周と上部台
座２Ｂとの間にはＯリング１０が介装されて気密
性が保たれている。 A flange-shaped portion 5A bored on the outer periphery of the outer cylinder member 5
A compression coil spring 9 is installed between the upper pedestal 2B and the upper pedestal 2B, and this spring 9 always urges the outer cylinder member 5 downward. Further, an O-ring 10 is interposed between the outer periphery of the outer cylinder member 5 and the upper pedestal 2B to maintain airtightness.
前記受皿部材６の上面には、半球形状に窪む凹
球面状のボール受皿面１１が形成されており、こ
のボール受皿面１１で中空のボール１２の下半分
を可及的密接して保持するようになつている。 A concave ball tray surface 11 recessed into a hemispherical shape is formed on the upper surface of the saucer member 6, and this ball tray surface 11 holds the lower half of the hollow ball 12 as closely as possible. It's becoming like that.
このボール受皿面１１には、第４図に示すよう
に中心部から放射方向に該受皿面１１の開口縁１
１Ａには至らない長さのエア通溝１３，１３……
が等角配置に複数条（図示の例では４条）形成さ
れており、これらエア通溝１３，１３……が交わ
るボール受皿面１１の中心部には受皿部材６の下
面に通ずるエア連通孔１４が穿設されている。な
お上記エア通溝１３，１３……は４条に限らず、
それ以上であつてもよく、またこのエア通溝１
３，１３……の断面形状は第５図に示すＶ字形の
ほか半円形等の任意の形状を選択することができ
る。 As shown in FIG.
Air ventilation grooves 13, 13 whose length does not reach 1A...
A plurality of strips (four strips in the illustrated example) are formed in an equiangular arrangement, and an air communication hole communicating with the lower surface of the saucer member 6 is provided at the center of the ball tray surface 11 where these air passage grooves 13, 13, . . . intersect. 14 are drilled. Note that the air passage grooves 13, 13... are not limited to four grooves,
It may be more than that, and this air passage groove 1
The cross-sectional shape of 3, 13, .
前記外筒部材５の上部開口縁５Ｂは、第２図に
示すように周方向の一部がボール１２側へ張出さ
れて突縁５Ｃ，５Ｃとされており、ボール１２の
上方への抜出しを防ぐようになされている。 As shown in FIG. 2, the upper opening edge 5B of the outer cylindrical member 5 has a portion in the circumferential direction extending toward the ball 12 side to form projecting edges 5C, which prevent the ball 12 from being pulled out upward. It is designed to prevent
前記受皿部材６の下面と下部台座２Ａの上面と
の間は圧力エア室１５とされ、このエア室１５に
は下部台座２Ａに設けられた圧力エア給排孔１６
を通じて外部から圧力エアの給排がなされるよう
になつており、圧力エア供給時にはピストン部材
４をバネ９による付勢力に抗して押上げるように
なつている。 A pressure air chamber 15 is formed between the lower surface of the saucer member 6 and the upper surface of the lower pedestal 2A.
Pressure air is supplied and discharged from the outside through the piston, and the piston member 4 is pushed up against the biasing force of the spring 9 when the pressure air is supplied.
次に上記実施例の作用を説明する。 Next, the operation of the above embodiment will be explained.
第２図の状態から下部台座２Ａの圧力エア給排
孔１６を通じて圧力エアが供給されると、エア室
１５の内部圧力が高まつて第３図のようにピスト
ン部材４がバネ９に抗して押上げられ、ボール１
２の上端が物品搬送面のレベルに位置される一
方、エア室１５からエア連通孔１４を通つてボー
ル受皿面１１側へ圧力エアが流入する。 When pressurized air is supplied through the pressure air supply/discharge hole 16 of the lower pedestal 2A from the state shown in FIG. 2, the internal pressure of the air chamber 15 increases and the piston member 4 resists the spring 9 as shown in FIG. ball 1
2 is located at the level of the article conveyance surface, while pressurized air flows from the air chamber 15 through the air communication hole 14 to the ball receiving tray surface 11 side.
この圧力エアは、ボール受皿面１１の中心部に
入り、この中心部から放射方向に等角配置に形成
されている複数条のエア通溝１３，１３……へ均
等に流入し、その末端および両側からボール受皿
面１１とボール１２との間に流出する。 This pressurized air enters the center of the ball receiving tray surface 11, flows evenly from the center into a plurality of air passage grooves 13, 13, . It flows out between the ball receiving tray surface 11 and the ball 12 from both sides.
これによりボール受皿面１１とボール１２との
間にエア膜が形成され、このエア膜によつてボー
ル１２が浮動状態に保持される。 As a result, an air film is formed between the ball receiving tray surface 11 and the ball 12, and the ball 12 is held in a floating state by this air film.
このようにして浮動状態に保持されたボール１
２上を物品が高速で通ると、ボール１２は殆んど
無抵抗で回転し、物品の移動に対し抵抗を与える
ことがない。特にボール１２が接触しやすいボー
ル受皿面１１の開口縁１１Ａ付近はエア通溝１
３，１３……の各末端から流出するエアが同開口
縁１１Ａより上方へ流出することになるので、ボ
ール１２の全周にわたつてエア膜が均厚に形成さ
れ、ボール１２がボール受皿面１１の開口縁１１
Ａ近くの内周面に当ることがなく、一層円滑なボ
ール１２の回転が得られる。 Ball 1 held in a floating state in this way
When an article passes over the ball 2 at high speed, the ball 12 rotates with almost no resistance and does not provide any resistance to the movement of the article. In particular, the air passage groove 1 is located near the opening edge 11A of the ball tray surface 11 where the ball 12 is likely to come into contact.
Since the air flowing out from each end of 3, 13, etc. flows upward from the opening edge 11A, an air film is formed in an even thickness over the entire circumference of the ball 12, and the ball 12 is placed on the ball receiving tray surface. 11 opening edge 11
Since the ball 12 does not hit the inner circumferential surface near A, smoother rotation of the ball 12 can be obtained.
エア室１５への圧力エアの供給が断たれると、
ピストン部材４はバネ９の付勢により下降し、ボ
ール１２も自重によりボール受皿面１１に安定着
座され、その上端は物品搬送面レベルより下位に
下降する。 When the supply of pressurized air to the air chamber 15 is cut off,
The piston member 4 is lowered by the bias of the spring 9, and the ball 12 is also stably seated on the ball receiving tray surface 11 by its own weight, and its upper end is lowered below the level of the article conveying surface.
したがつて自動プレス機械のように物品として
のワークが鋼板であつて、その鋼板が磨き鋼板や
塗装鋼板であつてもその移動をスムーズに行なわ
せ得ると同時に、すり傷をつけるおそれがなく、
迅速な移動を保証して作業のより一層の高速化を
図ることが可能となる。 Therefore, even if the workpiece is a steel plate, such as an automatic press machine, and the steel plate is a polished steel plate or a painted steel plate, it can be moved smoothly, and at the same time, there is no risk of scratches.
It is possible to guarantee quick movement and further speed up the work.
以上説明したように本考案による物品搬送用回
転支持装置は、ボールによる被搬送物品の支持は
圧力エアによるピストン部材の押し上げ力により
なさしめ、ボールの転動はピストン部材の上部の
ボール受皿面内のエア膜によりなさしめるので、
大きな支持力が得られながらボールの円滑な転動
が得られ、特にボール受皿面の開口縁内面との接
触がないとともにボールが中空で軽量であること
からボールの回転に全く抵抗が生じず、物品の急
速な移動に対しても完全に追従回転され、物品が
磨き鋼板や塗装鋼板のようにすり傷がつきやすい
ものであつても無傷搬送することができる。また
ボール受皿面には放射方向に等角配置される複数
条のエア通溝を形成することにより目的を達成し
ているので、その製造が容易であるとともに、目
詰りによるボールの偏りが生じることがなく、回
転不良を起すことなく常に安定した自由回転を得
ることができる。
As explained above, in the rotary support device for conveying articles according to the present invention, the articles to be conveyed are supported by the balls by the pushing up force of the piston member by pressurized air, and the rolling of the balls is carried out within the surface of the ball receiving tray on the upper part of the piston member. This is done by the air film of
Smooth rolling of the ball is achieved while a large supporting force is obtained.In particular, there is no contact with the inner surface of the opening edge of the ball receiving tray surface, and since the ball is hollow and lightweight, there is no resistance to the rotation of the ball at all. It rotates perfectly to follow the rapid movement of the article, and even if the article is easily scratched, such as a polished steel plate or painted steel plate, it can be transported without damage. In addition, this objective is achieved by forming multiple air passage grooves equiangularly arranged in the radial direction on the ball receiving tray surface, which makes manufacturing easy and prevents the balls from becoming unbalanced due to clogging. Therefore, stable free rotation can always be obtained without causing rotation failure.
第１図は本考案の一実施例を示す平面図、第２
図は第１図−線断面図、第３図は第２図のピ
ストン部材が上昇した状態時の断面図、第４図は
同ボール受皿面の拡大平面図、第５図は第４図
−線断面図、第６図は従来のボール受皿面の平
面図である。
１……物品搬送用回転支持装置、２……台座、
４……ピストン部材、５……外筒部材、９……コ
イルバネ、１１……ボール受皿面、１１Ａ……開
口縁、１２……中空のボール、１３……エア通
溝、１４……エア連通孔、１５……エア室、１６
……圧力エア給排孔。
Figure 1 is a plan view showing one embodiment of the present invention;
The figures are a sectional view taken along the line shown in Fig. 1, Fig. 3 is a sectional view taken when the piston member in Fig. 2 is in the raised state, Fig. 4 is an enlarged plan view of the ball receiving tray surface, and Fig. 5 is a sectional view taken along the line shown in Fig. 4. The line sectional view and FIG. 6 are plan views of the conventional ball receiving tray surface. 1... Rotation support device for transporting articles, 2... Pedestal,
4... Piston member, 5... Outer cylinder member, 9... Coil spring, 11... Ball saucer surface, 11A... Opening edge, 12... Hollow ball, 13... Air communication groove, 14... Air communication Hole, 15...Air chamber, 16
...Pressure air supply and discharge hole.
Claims (1)
降可能に設けられ上面に中空状のボール１２の下
半部を保持する凹球面状のボール受皿面１１が形
成された受皿部材６を有するピストン部材４と、 前記受皿部材６の下面と下部台座２Ａとの間に
気密に形成されたエア室１５と、 下部台座２Ｂに設けられ前記エア室１５内に連
通する圧力エア給排孔１６と、 前記受皿部材６のボール受皿面１１の中心部に
開口し前記エア室１５に連通するエア連通孔１４
と、 前記ボール受皿面１１にその中心部から等角配
置に放射方向に所要長さを有して刻設された複数
条のエア通溝１３，１３と を備え、 前記圧力エア給排孔１６を通じて供給される圧
力エアによりピストン部材４を上昇させるととも
にボール受皿面１１とボール１２との間にエア膜
を形成し、このエア膜によりボール１２をボール
受皿面１１内で浮動支持するようにしたことを特
徴とする物品搬送用回転支持装置。[Claims for Utility Model Registration] A pedestal 2, and a concave spherical ball receptacle that is provided on the upper pedestal 2B of the pedestal 2 in an airtight manner so that it can be raised and lowered, and that holds the lower half of the hollow ball 12 on its upper surface. A piston member 4 having a saucer member 6 on which a surface 11 is formed; an air chamber 15 airtightly formed between the lower surface of the saucer member 6 and the lower pedestal 2A; and the air chamber 15 provided in the lower pedestal 2B. a pressurized air supply/discharge hole 16 that communicates with the air chamber 15; and an air communication hole 14 that opens at the center of the ball tray surface 11 of the tray member 6 and communicates with the air chamber 15.
and a plurality of air passage grooves 13, 13, which are formed on the ball receiving tray surface 11 at a required length in the radial direction equiangularly from the center thereof, and the pressurized air supply/discharge hole 16 The piston member 4 is raised by the pressurized air supplied through the ball, and an air film is formed between the ball receiver surface 11 and the ball 12, and the ball 12 is supported floating within the ball receiver surface 11 by this air film. A rotary support device for transporting articles, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987036194U JPH0527370Y2 (en) | 1987-03-12 | 1987-03-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987036194U JPH0527370Y2 (en) | 1987-03-12 | 1987-03-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63142315U JPS63142315U (en) | 1988-09-20 |
| JPH0527370Y2 true JPH0527370Y2 (en) | 1993-07-13 |
Family
ID=30846374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987036194U Expired - Lifetime JPH0527370Y2 (en) | 1987-03-12 | 1987-03-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0527370Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4973839B2 (en) * | 2006-05-19 | 2012-07-11 | いすゞ自動車株式会社 | Ball bearing casters |
| JP2011080501A (en) * | 2009-10-05 | 2011-04-21 | Freebear Corp | Ball type support device and work conveying device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6151405A (en) * | 1984-08-20 | 1986-03-13 | Ntn Toyo Bearing Co Ltd | Article transport device |
-
1987
- 1987-03-12 JP JP1987036194U patent/JPH0527370Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6151405A (en) * | 1984-08-20 | 1986-03-13 | Ntn Toyo Bearing Co Ltd | Article transport device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63142315U (en) | 1988-09-20 |
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