JPH0229115Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a stopper device installed at the table side end of a table lift to prevent a loaded object from slipping.

[Conventional technology]

In general, a table lift has arms that intersect in an X shape between a base and a table positioned above the base, and the angle formed by these intersecting arms is changed by a telescoping device to move the table horizontally up and down. In addition, a stopper device is installed at the side end of the table to prevent the loaded items from sliding off.

By the way, among the above-mentioned stopper devices, the one on the table side end which is the side for carrying out the loaded object does not act on the loaded object during unloading, but in other cases, it acts on the loaded object and prevents it from sliding off the table side edge. Therefore, a stopper is provided on the table so as to be able to move up and down, and a drive device is installed to operate this stopper by electrical means, and the stopper is opened and closed by raising and lowering the table. A limit switch is provided, and when the table is raised and lowered to reach the unloading position, the stopper is retracted below the loaded object loading surface, making it possible to unload the loaded object. The stopper device is configured to be maintained in a state of protruding upward from the surface.

[Problem that the invention attempts to solve]

As described above, the conventional stopper device is configured to move the stopper up and down by electrical means, so when using the table lift, the stopper drive device must be connected to the power source each time. Particularly when there is no wiring facility at the place where the table lift is used, it is necessary to connect to a power source located far away using a long cord, which is extremely troublesome and inconvenient to use.

In order to solve the above-mentioned drawbacks of the conventional method, this invention
When the angle formed by the arms crossed in an X-shape is changed by the telescoping device, the end of the arm that is in contact with the table moves parallel to the table, which is used to move the stopper up and down. The purpose is to measure the

[Means for solving problems]

A configuration for achieving the above object will be described below using FIGS. 1 to 6, which correspond to embodiments.

One end of each arm 4, 5, 4, 5 crossed in an X shape by pivoting the middle part to the base 1
and the table 2, and contact the base 1 and the table 2 via rollers 11, 12, 11, 12, the other end of which is pivotally supported on the table 2, and the angle formed by the intersecting arms is adjusted to the telescopic device 14. In this table lift, the other end of the arm 4 is moved parallel to its contact surface to raise and lower the table 2 in a horizontal state. A slider 17 for engaging a guide supported coaxially with the roller 11 pivotally supported on the other end near the table side end on one side.
A stopper 23 is provided at the other end of the table on the side where the slider is provided to prevent the loaded object from slipping down that passes through the table and moves up and down. A slider engagement guide 24 consisting of a straight portion 24a, a high straight portion 24b, and a diagonal portion 24c communicating between them is provided, and both straight portions 24 of the guide are provided.
When the slider 17 is located on the lower straight portion 24a, the stopper 23 is projected upward from the load placement surface a on the table, and when the slider 17 is located on the higher straight portion 24b, the height difference between It is set so that it is recessed below the mounting surface.

[Effect]

First, one end of the guide 24 (left end in Figure 1)
One end is connected to the lower straight part 24a, and the other end is connected to the higher straight part 2.
4b will be explained. As shown in FIG. 4, by raising the table 2 to the height of the loaded load loading position _H4 at a high place, the slider 17 will be located at the lower straight portion 24a of the guide, and the stopper 23 will move the loaded load. It is held in a state where it protrudes upward from the mounting surface a. Therefore, load A is carried to table 2 from the side opposite to the stopper 23 side, and then table 2 is transferred to table 2 via H ₃ and H ₂ .
By descending to the position _H1 , the slider 17 moves from the lower straight portion 24a to the higher straight portion 24b via the oblique portion 24c. In this case, when the slider 17 moves to the end of the lower straight portion 24a, the table 2 moves to the _H3 position, and when it moves to the end of the slanted portion 24c, it moves to the _H2 position, and further to the higher straight portion 24b. By setting the lengths of the lower straight portion 24a, the oblique portion 24c, and the higher straight portion 24b so that the table 2 descends to the lowest position _H1 when moving to the end of the table 2, While the stopper 23 is lowered to the _H3 position, the stopper 23 is maintained in a protruding state above the load placement surface a, and between the next _H3 and _H2 , the stopper 23 is gradually lowered, and then the next H ₂
~ _H1 , it is maintained in a retracted state below the loaded object placement surface a. Therefore, the loaded object A can be carried out to the stopper 23 side between _H1 and _H2 , and the loaded object A can be carried out within this height range. At a height other than the above, the stopper 23 projects upward, thereby preventing the loaded object A from sliding down.

Next, the high and low straight portions 24a and 24 of the guide 24
The case where the position b is formed opposite to the above will be explained. As shown in FIG. 5, by lowering the table 2 to the height of the low load carrying-in position _H1 , the slider 17 is moved to the lower straight part 2 of the guide.
4a, and the stopper 23 is held in a state of protruding upward from the load placement surface a on the table 2. Therefore, after carrying the load A onto the table 2, the table 2 is passed through H ₂ and H ₃ .
By raising it to the position _H4 , the slider 17 moves from the lower straight part 24a to the higher straight part 24b via the oblique part 24b, similar to the case in FIG. 4 described above. The stopper 23 is moved up and down by this action. Therefore
The loaded object A can be carried out between _H3 and _H4 , and at heights other than the above, the stopper 23 projects upward, thereby preventing the loaded object A from sliding down.

〔Example〕

Examples of this invention will be described below based on the drawings. In FIGS. 1 to 3, reference numeral 1 indicates a base of the table lift, and reference numeral 2 indicates a table located above the base, which is formed by a plate 2a and a reinforcing frame 2b provided around the lower surface thereof. Between the base 1 and the table 2, a set of two arms 4, 5, 4, 5, which intersect in an
The arm is arranged in the left-right direction in the figure, and one end of the arm is pivoted to the side ends of the base 1 and table 2 by shafts 6 and 7, and the other end is pivoted to shafts 8 and 9 installed on the ends. Pressed rollers 11, 12, 1
The table 2 is supported horizontally by being movably brought into contact with guide rails 13, 13 fixed to the base 1 and the lower surface of the table 2 via the guide rails 1, 12.

14 is a hydraulic cylinder 14a and a piston rod 1
4b, and a hydraulic cylinder 14a.
The base end of is pivotally connected to the roller pivot shaft 9 on the base side,
The tip of the piston rod 14b is pivotally connected to a connecting shaft 15 installed between the intersecting upper parts of the arms 4, 4 on both sides, and the angle formed by the intersecting arms 4, 5, 4, 5 can be changed by the stroke operation of the piston rod 14b. By doing so, the other end of the arm moves parallel to the contact surface, and the table 2
is raised and lowered in a horizontal position.

16 is a table 2 so that the moving direction of the loaded object A is perpendicular to the arrangement direction of each arm 4, 5.
In the roller conveyor disposed on the top surface, the frames 16a, 16a on both sides are formed higher than the periphery of the conveyor roller 16b, which serves as the loaded object mounting surface a, to prevent the loaded object A from sliding off the frame side. ing.

Reference numeral 17 denotes a slider made of rollers, which is pivoted on an extension 8' of a roller pivot shaft 8 installed on the table side end of the arm 4, so that the slider 17 slides on one side of the other end of the arm 4. It is supported near the side edge of the table 2,
When the other end of the arm 4 moves, it moves parallel to the table 2. 18 is another slider made of rollers having the same diameter as the slider 17, and is pivotally attached to one end of the rod 19. The other end of this rod 19 is inserted into an extension 8' of the roller pivot shaft, and this slider 18 and the slider 17 move in conjunction with each other. Reference numeral 20 denotes a guide roller which is horizontally pivoted on the upper surface of one end of the rod 19, and is positioned between two parallel plates 21, 21 vertically installed on the lower surface of the table 2, so that the slider 18 is not moved in the linear direction. It makes it easier to move.

22 is a long hole for penetrating the stopper, which is bored at the end of the table 2 on the side where the sliders 17 and 18 are provided;
It is formed along the side edge of the table 2. Reference numeral 23 denotes a plate-shaped stopper inserted into the elongated hole 22 so as to be vertically movable, and guides 24 and 25 having inward grooves are extended on both left and right sides of the inner side surface of the lower part. Slider 1 is installed on the right guide 24.
7, and there is another slider 18 on the left guide 25.
is engaged by being fitted into the groove. Each of the guides 24, 25 has one end (left end) connected to a low straight portion 24a, 25a parallel to the table 2, and the other end (right end) connected to a similar high straight portion 24b, 25b, and between the two. are formed in the inclined parts 24c, 25c, and the height difference between the lower straight parts 24a, 25a and the higher straight parts 24b, 25b is the same as that of the sliders 17, 18.
When the stopper 23 is located in the lower straight portions 24a, 25a, the stopper 23 is projected upward from the load placement surface a on the table 2, and the stopper 23 is located in the higher straight portions 24b, 25.
When it is located at position b, it is set to be recessed below the mounting surface a.

Reference numerals 26 and 26 denote guide rollers disposed at both ends of the stopper 23 so that the stopper 23 can move up and down smoothly. 27 is a known eccentric stopper device disposed on the upper surface of the side end of the table 2 opposite to the stopper 23, and the plate-shaped stopper piece 27
By eccentrically supporting a on the shaft 27b, it can rotate in the direction in which the loaded object A is carried in, but cannot rotate in the opposite direction, thereby preventing the carried loaded object A from slipping. That's what I do.

Next, referring to FIG. 4, a case will be described below in which a table lift equipped with a stopper device configured as described above is used to lower a load from a high place to a low place. By changing the angle formed by the cross arms 4, 5, 4, 5 by extending the telescoping device 14, and raising the table 2 to the height of the high load loading position _H4 ,
The sliders 17 and 18 are located at the lower straight parts 24a and 25a of the guides 24 and 25, respectively, and the stopper 23 is held in a state where it projects upward from the load placement surface a on the table 2. . Therefore, the load A is carried in from the side opposite to the stopper 23 side and placed on the roller conveyor 16. Thereafter, by gradually reducing the telescopic device 14 and changing the angle formed by the intersecting arms, the table 2 is lowered through H ₃ and H ₂ to the H ₁ position, thereby moving the sliders 17 and 18, respectively. The guide moves from the lower straight parts 24a, 25a to the higher straight parts 24b, 25b via the oblique parts 24c, 25c. In this case, the sliders 17 and 18 are connected to the lower straight portion 24.
When moving to the end of portions 24c and 25a, table 2 moves to the _H3 position and slanted portions 24c and 25c.
The lower straight parts 24a, 25a, and the diagonal parts are moved so that when moving to the end of the higher straight parts 24b, 25b, the lower straight parts 24a, 25a _, and the inclined part are lowered to the lowermost position of _H1 . shaped part 24
By setting the respective lengths of c, 25c and the high straight portions 24b, 25b, the table 2 can be
While descending to the _H3 position, the stopper 23 is maintained in a protruding state above the load placement surface a, and then gradually lowered between _H3 and _H2 ,
Further, during the next period from H ₂ to _{H 1} , it is maintained in a recessed state below the loaded object placement surface a. Therefore, since it becomes possible to carry out the loaded object A to the stopper 23 side between _H1 and _H2 , the loaded object A can be carried out within this height range. At a height other than the above, the stopper 23 projects upward, thereby preventing the loaded object from sliding down.

In the above, the guides 24 and 25 are formed so that the low straight part is located at one end and the high straight part is located at the other end, but as shown in FIG. 5, the low straight part and the high straight part It is also possible to form and implement it so that the left and right sides are reversed, and in this case, it can be applied to lifting cargo from a low place to a high place. In other words, by lowering the table 2 to the height of the low load loading position H ₁ , the sliders 17 and 18 are located at the lower straight parts 24 a and 25 a of the guide, and the stopper 23 is moved to the lower position on the table 2 . It is held in a state where it protrudes upward from the load placement surface a. There, load A is brought in and transferred to roller conveyor 1.
After placing the table 2 on H ₂ , H ₃ and then H ₄
By raising it to the position of slider 1
7 and 18 will move from the lower straight parts 24a and 25a of the guides 24 and 25, respectively, to the higher straight parts 24b and 25b via the oblique parts 24c and 25c, so the same steps as in the case of FIG. The stopper 23 is moved up and down by this action. Therefore, the loaded object A can be carried out between _H3 and _H4 , and the stopper 23 is in a protruding state at heights other than the above, thereby preventing the loaded object A from sliding down.

The stopper device of this invention can be installed not only at one end of the table as described above, but also at both ends of the table as shown in FIG. In this case, the guide at one end is formed such that a low straight part is located at one end and a high straight part is located at the other end, as shown in FIGS. 1 to 4. As shown in FIG. 5, the end guide has a configuration in which a high straight portion is located on one end side and a low straight portion is located on the other end side.
With this configuration, it is possible to provide a table lift that can be used for both lifting and lowering.

In the above embodiment, in addition to providing the slider 17 on the side of the other end of the arm 4, another slider 18 that moves in conjunction with the slider 17 is provided, and the stopper 2
3 is configured so that the vertical movement of the stopper 23 is performed from two places on the left and right sides of the lower part, so that the vertical movement of the stopper 23 can be performed even more smoothly. In this case, the separate slider 18, rod 19, guide 25 for engaging the slider 18, etc. can be omitted.

Further, in the above description, the roller conveyor 16 is provided on the top surface of the table 2, but it may be implemented without providing it, and in that case, the top surface of the table 2 becomes the loaded object mounting surface a.

[Effect of idea]

As explained above, in this invention, the other end of the arm 4 on the table side has a guide coaxially supported with the roller 11 pivotally supported on the other end near the table side end on one side of the arm 4. A slider 17 for engagement is provided, and a stopper 23 is provided at the end of the table on the side where the slider 17 is provided to prevent the loaded object from sliding down as it passes through the table and moves up and down. The slider engagement guide 24 is extended and consists of a low straight part 24a and a high straight part 24b parallel to the table 2, and a diagonal part 24c communicating between them, and both the straight parts 24a, 24b, when the slider 17 is located at the lower straight portion 24a, the stopper 2
3 protrudes upward from the load placement surface a on the table 2, and is recessed below the placement surface a when located on the high straight portion 24b, so that the other end of the arm The stopper can be moved up and down by movement, so it can be used without any problems even in the absence of electrical equipment, and the entire device can be simplified. Furthermore, according to this invention, since the slider moves parallel to the table, while the slider is located at the lower straight portion of the guide, the stopper is maintained in a state of protruding above the load placement surface. Therefore, as long as the slider is located at any height during that state, it will act as a stopper to prevent the loaded object from slipping, and while the slider is located at the higher straight part of the guide, , the stopper is maintained in a retracted state below the loaded object placement surface, so that the loaded object can be carried out no matter what height the table is in while in this state. Therefore, it is possible to provide a stopper device that can cope with slight variations in the loading height and unloading height.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view showing an embodiment of this invention, Fig. 2 is an enlarged sectional view taken along the line shown in Fig. 1, and Fig. 3
The figure is a partially cutaway enlarged perspective view of the main part, Figure 4 is a schematic front view for explaining the relationship between the table height and the vertical movement of the stopper, and Figure 5 is the lower straight part and the higher part of the slider engagement guide. Figure 6 is a schematic front view for explaining the relationship between the table height and the vertical operation of the stopper when the straight parts are arranged in reverse. FIG. 3 is a partially cutaway side view of the main part showing the elevated state. DESCRIPTION OF SYMBOLS 1...Base, 2...Table, 4, 5...Arm, 8...Roller pivot shaft, 8'...Extension part of roller pivot shaft, 11, 12...Roller, 14...Extension device, 17...Slider, 23...Stopper,
24...Guide, 24a...Low linear part of the guide, 24b...High linear part of the guide, 24c...
Slanted part of the guide, a... loaded object placement surface.

Claims (1)

[Claims for Utility Model Registration] (1) One end of each arm 4, 5, 4, 5 crossed in an X shape by pivotally connecting the middle to the base 1 and table 2, and the other end is brought into contact with the base 1 and the table 2 via rollers 11, 12, 11, 12 pivotally supported on the ends,
However, in a table lift in which the crossing angle of the arm is changed by the telescoping device 14 and the other end of the arm is moved parallel to its contact surface, the table 2 is raised and lowered in a horizontal state. At the other end of the table side,
A slider 17 for engagement with a guide supported coaxially with the roller 11 pivotally supported on the other end is provided near the table side end on one side, and a slider 17 for engaging the guide is provided on the side where the slider is provided. A stopper 23 is provided at the table side end to prevent the loaded object from sliding down as it passes through the table and moves up and down, and a lower straight part 24a and a higher straight part 24b parallel to the table 2 are connected to the lower part of the stopper 23. Slider engagement guide 24 consisting of a diagonal portion 24c that
and both straight portions 24a of the guide,
24b, when the slider 17 is located on the low straight section 24a, the stopper 23 is projected upwards from the load placement line a on the table, and when it is located on the high straight section 24b, the stopper 23 is A stopper device for preventing a loaded object from slipping off in a table lift, which is configured to be recessed below the loading surface. (2) The guide 24 has a low straight section 24a at one end in the length direction, and a high straight section 24 at the other end.
A stopper device for preventing a loaded object from slipping off in a table lift according to claim 1, which is formed so that point b is located. (3) The guide 24 has a high straight portion 24b at one end in the length direction, and a low straight portion 24b at the other end.
A stopper device for preventing a loaded object from slipping off in a table lift according to claim 1, which is formed so that point a is located. (4) The guide 24 has a groove on its side surface, and the slider 17 is formed as a roller that fits into the groove, and this roller is an extension of the shaft 8' that pivotally supports the roller 11. A stopper device for preventing a load from sliding off in a table lift according to any one of claims 1 to 3, which is pivoted to a table lift.