JP2827165B2 - Elevating display trolley - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for lowering a lifting platform serving as a loading platform when loading goods, thereby facilitating a loading operation, etc., and raising the lifting platform when displaying products. The present invention also relates to a lifting display trolley that makes it easy for customers to pick up products.

[0002]

2. Description of the Related Art As a typical example of this type of the related art,
There are those disclosed in Japanese Utility Model Publication No. 3-2456 and Japanese Patent Laid-Open Publication No. 58-89467.

[0003] In each of these liftable display carts, the lower end of an X-link that is vertically expandable and contractible is attached to the upper surface of a substantially horizontal base, and the elevator is supported by the upper end of the X-link. And a vertically extensible rod of a hydraulic jack fixed to the upper surface of the base is directly or indirectly connected to one of the links constituting the X-link, and the rod of the hydraulic jack is extended and contracted, thereby raising and lowering the platform. Is moved up and down.

[0004]

However, in the above-mentioned prior art, since the X-link is expanded and contracted using the hydraulic jack, the structure of the entire apparatus becomes complicated and the manufacturing cost increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide an inexpensive lifting display cart having a simple structure and a low cost.

[0006]

According to the present invention, the above-mentioned problem is solved as follows. (1) substantially on a base of the upper surface forming the horizontal, the central portions of the two links of equal length, the lower end of one of the links X link pivotally mounted with the lateral direction axis, with the right and left direction axis group While pivotally attached to the base, the lower end of the other link is pivotally supported on the base so as to be movable in the front-rear direction, and the upper end of the one link is freely movable in the front-rear direction on the lower surface of the almost horizontally elevating platform. The other end of the connection link pivotally attached to the upper end of the other link, one end of which is pivotally attached to an intermediate portion of the one link with an attachment shaft , and one end of the connection link also has a rotation shaft.
The other end of the pivotally mounted drive link to the base I, and pivotally connected to each other with a connecting shaft, and, on the base, a rotating means for rotating said drive link, the lifting platform is raised straight to the connecting shaft, connecting the center of the rotating shaft and the mounting shaft
A stopper is attached to the drive link at a position passing through the line and over the dead center so as to abut against the drive link and stop its rotation.

(2) In the above item (1), the rotating means is detachably provided on a rotating shaft which rotates integrally with the drive link.

(3) In the above (1) or (2), the mounting position of the stopper can be adjusted in the front-rear direction.

[0009]

An embodiment of the present invention will be described below with reference to the accompanying drawings. In the following description, the right side of FIG. 1 is referred to as “front”, and the left side is referred to as “rear”.

The horizontal base (1) is formed by bending four side edges of a metal plate having a substantially rectangular shape in plan view downward, and casters (2) are provided at four corners on its lower surface. Is installed. Near the left and right ends of the upper surface of the base (1), a lower rail (3) having a U-shaped cross section and pointing in the front-rear direction.
Is fixed.

[0011] such as two elongated plate-like first link forming the length
The lower end of the first link (4) in the pair of left and right X links (7), which is pivotally connected to the center of the second link (5) and the center of the second link (5) by an axis (6) facing left and right, is a lower rail. The second link is pivotally attached to the rear part of the inner surface of (3) so as to be vertically rotatable.
A slide pin (8) protruding from the outer surface of the lower end of (5) is fitted into a longitudinal hole (9) provided at the front of the lower rail (3) and pointing in the front-rear direction. ing. The lower ends of the left and right second links (5) and (5) are
They are connected by a horizontal connecting rod (10).

The upper end of each second link (5) is a horizontal lift
Lower rail fixed to both left and right sides of the lower surface of (11)
It is pivotally attached to the rear end of the inner surface of the upper rail (12) having the same shape as (3) . A sliding pin (13) projecting from the outer surface of the upper end of the first link (4) is fitted into a longitudinal hole (14) formed in the front part of the upper rail (12) and pointing in the front-rear direction. I have.

[0013] Inside the center of each lower rail (3)
A through hole (15) is formed in the upper surface of the base (1) so as to face in the front-rear direction . In this through hole (15), a toggle link in which the lower end of a drive link (16) and the upper end of a connection link (17) located close to each other are pivotally connected by a connection shaft (18) facing left and right. The drive link (16 ) in (19) is inserted.

[0014] Under end of the drive link (16), the rotary shaft facing the lateral direction coupling unit forming a square cross section at both end portions protruding on both sides (20) are formed of the base (1) (21 ) Is fixed. The rotating shaft (21) is connected to the left and right side surfaces (1) of the base (1).
A through hole (not shown) provided in a) is rotatably supported by a bearing (22) fixed outside the through hole.

The coupling portion (20) of the rotating shaft (21) has a lateral fitting hole complementary to the coupling portion (20) formed at the base end of the L-shaped pivoting lever (23) in plan view. (Not shown) can be fitted, and in a state where it is fitted, the handle (2) of the rotating lever (23) is
By rotating 4) by hand, the drive link (16) is rotated together with the rotating shaft (21).

The upper end, which is the base end of the connecting link (17),
Left and right connecting links (17), (17), which are pivotally attached to an intermediate portion of the first link (4) by a mounting shaft (25) facing left and right.
The ends on the are connected by a connecting rod facing the lateral direction (26).

[0017] In the immediately preceding respective holes (15) (15), base
The upper surface of (1), for restricting the rotation range of the drive link (16), a stopper which forms a side view L-shaped (27) is a solid wear.

As shown in FIG . 3, the rear end face (1b) of the base (1)
Concave holes formed in the right and left two places (not shown), the concave hole <br/> out from the freely receiving material (28) is provided. The mounting hole facing vertically provided at the tip portion of the receiving material (28) (29), the lower end portions of both side beams of a downward U-shaped handle (30) (31) (31)
Can be inserted . This allows
Remove the handle (30) removed from the receiving material (28) and place it on the rear end face of the base (1).
Through an opening (not shown) provided in (1b), it can be stored in the internal space of the base (1).

Next, the operation of this embodiment having the above-described configuration will be described.

As shown in FIG. 3, when the X-link (7) is folded down and the elevating platform (11) is brought down to a position close to the base (1), the X-link (7) is connected to the connecting portion (20) of the rotating shaft (21). , handle (24) almost directly above
After fitting the base end of the turned rotation lever (23), as shown in FIG. 4, when the handle (24) is turned forward and downward by about 90 °, the toggle link (19) in the shortened state is It extends upward.

[0021] toggle link (19) is extended, the upper and lower sliding pin (8) (13) moves within the long hole (9) (14) to the rear,
Folded have left and right X link (7) (7) is expanded in the vertical direction, the elevation frame (11) is raised while keeping the base (1) and parallel state.

After the connecting shaft (18) has passed the straight line (L) connecting the center of the rotating shaft (21) and the mounting shaft (25) and passed over the dead center, the drive link (16) is stoppers (27) in contact, the clockwise rotation of more 4 Ru locked inhibitory (Fig. 4
State) . As a result, the lift (11) is stably held at the required lift position.

In order to lower the raised platform (11), the rotating lever (23) may be returned from the position shown in FIG. 4 to the position shown in FIG.

According to the lift-type display trolley of this embodiment, the structure of the entire apparatus can be simplified and the production cost can be reduced as compared with the conventional one.

The connecting portion of the rotating shaft (21) from both sides of the base (1)
(20) is protruded, so that even when one side of the liftable display cart is installed close to the wall of a store or the like, the connecting portion (20) of the rotating shaft (21) projecting from the other side ) Can be used to raise or lower the lifting platform (11), which is convenient.

The front ends of the first and second links (4) and (5) are pivotally connected to the rails (3) and (12), and the elongated holes () are provided at the rear ends of the upper and lower rails (3) and (12). 9) (14), the first and second link (4)
(5) Insert the sliding pins (8) and (13) projecting from the rear end into the long holes (9).
(14) may be fitted.

As shown by the imaginary line in FIG. 4, the stopper (27)
Can be adjusted in the front-rear direction within the rotation range of the drive link (16), the height of the elevator (11) can be arbitrarily changed, and the usability is improved.

Instead of using the rotating lever (23), for example, an output shaft such as a deceleration motor (not shown) may be linked to the rotating shaft (21), and the lifting platform (11) may be moved up and down by the motor. Good.

[0029]

(A) According to the first aspect of the present invention, the height of the elevator can be adjusted and held in two stages of the lowering position and the raising position, and the entire apparatus can be made simple and inexpensive. Can be.

(B) According to the second aspect of the present invention, the drive lever can be easily rotated by the rotation lever, and can be detached from the rotation shaft when the rotation lever is unnecessary. It is convenient because it can be done.

(C) According to the third aspect of the present invention, the height of the lift table can be arbitrarily changed by adjusting the front-rear position of the stopper, thereby improving the usability.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of one embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a side view showing a state where the elevator is lowered.

FIG. 4 is a side view showing a state where the elevator is raised.

[Explanation of symbols]

(1) Base (1a) Side surface (1b) Rear end surface (2) Caster (3) Lower rail (4) First link (5) Second link (6) Shaft (7) X link (8) Sliding pin (9) Slot (10) Connecting rod (11) Lifting platform (12) Upper rail (13) Sliding pin (14) Slot (15) Through hole (16) Drive link (17) Connecting link (18) Connection Shaft (19) Toggle link (20) Joint (21) Rotating shaft (22) Bearing (23) Rotating lever (24) Handle (25) Mounting shaft (26) Connecting rod (27) Stopper (28) Receiving material ( 29) Mounting hole (30) Handle (31) Lower end

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B62B 3/06 A47F 5/10 B66F 7/06

Claims (3)

(57) [Claims] [Claim 1] A base of the upper surface substantially forming a horizontal, etc. length 2
The lower end of one link of the X link, which is pivotally connected to the center portions of the links with the left-right axis, is pivoted to the base with the left-right axis, and the lower end of the other link in the front-rear direction. The upper end of one of the links is pivotally supported on the lower surface of a substantially horizontal lift platform so as to be movable in the front-rear direction, and the upper end of the other link is pivotally attached to the lower surface of a substantially horizontal elevating platform. The other end of the connection link pivotally attached to the intermediate portion of the one link with the mounting shaft , and one end is
The other end of the pivotally mounted drive link to the base with the rotation axis, with a coupling shaft pivotally attached to each other and to the base, a rotating means for rotating said drive link, the lifting platform is Ascending , the connecting shaft is positioned between the mounting shaft and the rotating shaft.
A lift display trolley having a stopper that abuts the drive link at a position passing through a straight line connecting the hearts and crossing over the dead center to stop the rotation of the drive link. 2. The lift-type display cart according to claim 1, wherein the turning means is a turning lever detachably provided on a rotating shaft that turns integrally with the drive link. 3. The lifting display trolley according to claim 1, wherein the mounting position of the stopper is adjustable in the front-rear direction.