Title:
無人搬送車
Document Type and Number:
Japanese Patent JP6848651
Kind Code:
B2
Abstract:
An auto guide vehicle (20) that conveys a cart (10), wherein the auto guide vehicle (20) is provided with: a fluid pressure cylinder (22) that is able to be extended and retracted vertically, and that applies an upward pressing force to the floor surface of the cart (10); a fluid pressure supply device (70) that supplies a fluid to the fluid pressure cylinder (22); pressure regulating means (50) that regulates the fluid pressure of the fluid supplied from the fluid pressure supply device (70) to the fluid pressure cylinder (22); a control board (40) that outputs a fluid pressure command value to the pressure regulating means (50); and a pressure sensor (100) that detects the fluid pressure of the fluid supplied to the fluid pressure cylinder (22); wherein the control board (40) computes derivatives of the fluid pressure detected by the pressure sensor (100), estimates a timing at which the cart begins to leave the ground based on a pattern of the computed derivatives, and computes the command value by multiplying a coefficient less than one by the fluid pressure detected by the pressure sensor (100) at the estimated timing.
Inventors:
Yasuhiro Nishizawa
Toshiyuki Ueno
Yuya Matsushita
Toshiyuki Ueno
Yuya Matsushita
Application Number:
JP2017087864A
Publication Date:
March 24, 2021
Filing Date:
April 27, 2017
Export Citation:
Assignee:
KABUSHIKI KAISHA MEIDENSHA
International Classes:
B61D47/00; B60P1/02; B61B13/00
Domestic Patent References:
| JP2017119451A | ||||
| JP201747996A | ||||
| JP925095A | ||||
| JP5162620A | ||||
| JP2011240781A |
Foreign References:
| US5075853 |
Attorney, Agent or Firm:
Sonoda/Kobayashi Patent Business Corporation