JPH0249868A - Safety device for two-stage parking system - Google Patents

Abstract

PURPOSE:To prevent a ramp from falling off with certainty by engaging a hook installed in a free end part of a cylinder with an engaging pin at the column side at an ascending position of the ramp, and at the time of descending, releasing this engagement by action of an arm. CONSTITUTION:A hook 20 installed at the free end side of a cylinder 14 lifting a ramp 5 up or down is automatically engaged with an engaged pin 24 at the side of a column 2 at an ascending position, making it hold the ramp 5, and thereby its falling is checked. Next, in case of descending of the ramp 5, the cylinder 14 is slightly operated in the ascending direction of the ramp 5, an arm 26 is made contact with a first contact member 28, rotating the hook 20, and engagement with the engaged pin 24 is released. Then, the cylinder 14 is operated in the descending direction of the ramp 5, and the arm 26 is made contact with a second contact member 29, rotating the hook 20, and it is reset to its engageable position with the engaged pin 24. Then, in this state intact, the ramp 5 is lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a safety device in a device for parking two vehicles that can reliably hold a platform on which vehicles are placed in a raised position.

(b) Prior art A conventional parking device has a pair of columns erected on the left and right sides of a frame, a ceiling cover is attached to the upper end of the column, and a lift platform for mounting a vehicle is provided between the pair of columns. The lifting platform is raised and lowered by moving a chain provided between the column and the platform by the expansion and contraction of a hydraulic cylinder provided on the column.

Since it is held by a hydraulic cylinder, if oil leaks due to damage to the hydraulic piping or oil leaks inside the hydraulic cylinder due to wear of the cylinder piston sealing material, the platform will fall under its own weight or the weight of the vehicle. There is a danger.

The present invention was made to solve the above-mentioned problems.
The purpose of this is to automatically lock the free end of the cylinder when the platform is in the raised position, and to automatically release the lock when the platform is lowered so that the platform will fall when the platform is in the elevated position. To provide a safety device for a two-level parking device that prevents the parking device from being damaged.

(d) Means for Solving the Problems The present invention achieves the above object, and includes a pair of pillars erected on the left and right sides of the base, a ceiling cover provided above the pillars,
A lifting platform for mounting on a vehicle is provided between the pair of pillars, and a cylinder provided on the pillar is provided so that the lifting arm can be rotated, and the hook can be moved between a hook locking position and a locking release position. a first abutting member, which is constantly biased by a spring provided so as to exceed a dead point between the first and second abutting members, and which rotates the hook to an unlocking position when it comes into contact with the arm; The present invention relates to a safety device for a two-stage parking device, which is provided with upper and lower second contact members that return the hook to the locking position upon contact with the arm.

(e) The lifting platform is raised by extending or contracting the operating cylinder.

When the lifting platform reaches the raised position, the hook on the free end side of the cylinder automatically engages with the locking pin on the column side, thereby preventing the lifting platform from falling.

Next, when lowering the platform, operate the cylinder in the direction of slightly raising the platform, bring the arm into contact with the first contact member, rotate the hook, and lock the platform by rotating the hook. Release the engagement with the pin.

If you operate the cylinder in the direction of lowering the platform in this state,
The arm contacts the second abutting member and rotates the hook. The rotation of the hook returns to the position where it engages with the locking pin. In this state, the cylinder is actuated in the direction of lowering the platform to lower the platform to its lowest position. The vehicle will then be loaded and unloaded.

(f> Example below) To explain the example using the drawings, (1) is a grounded base, and on the left and right of the base (1) are a pair of supports (2) (2).
is erected, and a ceiling cover (3) is provided at the upper end of the support column (2H2).

In addition, there is a concave car stop (4) between the pair of pillars (2) (2).
) is provided with a lifting platform (5).

The pair of pillars (2) (2) have the same structure, so to explain one of them, the front and rear pillar bodies (6) (7) have a box-like cross section.
) are erected on a base (1) with a space provided in the front and back, and the upper ends of both pillar bodies (6, 7) are partially fixed to the ceiling cover (3) via a bracket (8).

(9) . . . is a driving cylinder provided between both strut bodies (6) and (7), and melt (14) is provided between both strut bodies (6) and (7) in order to strengthen both strut bodies (6) and (7). The upper end of the cylinder (14) is pivotally supported on the bracket (8), and the lower end which is the free end of the cylinder (14) is provided with a movable sprocket (16) via a sliding plate (15). ) are both pillar bodies (6
) (7) The guide frame (17) (
17).

A chain (18) is passed between the support main body (6) and the elevating member (10), and the chain (18) is attached to the movable sprocket (16) and the support main body (7) above the pivot support. It is located in front of the center of gravity in case (5).

A plurality of shafts (11) are made to protrude from the outside of the elevating member (10) (10), and the shaft (11)
)... are provided with guide rollers (12)..., respectively, and these guide rollers (12)... are provided with the support main body (6)...
) (γ) Guide rail (13) provided on the opposite side
(13) It is provided so that the upper part can be moved, thereby supporting the lifting platform (5) in a substantially horizontal state.

The get (16) can move downward to raise the lifting platform (5).

(20) is a rotatable shaft (21) at the bottom of the sliding plate (15)
, and the hook (20) has an engaging part (2
2) and a guide surface (23) are formed, and the engaging portion (
22) is a locking pin (24) fixed to the bracket (9).
).

A first arm (25) and a twenty-seventh arm are provided at both ends of the shaft (21).
- arm (26), and both arms (25) and (26) are provided.
can rotate integrally with the hook (20) via the shaft (21).

A spring (27) is provided between the first arm (25) and the first movement plate (15), and the spring (27)
7), the dead point is exceeded between the engagement position and the disengagement position of the hook (20).

(28) (29) are both brackets (9) (9)
A first abutting member and a second abutting member are fixed to each other, and both members (28) are provided below.

The first arm (25) comes into contact with the first contact member (28) when the sliding plate (15) descends, thereby rotating the hook (20) in the disengagement direction. , the second arm (26) comes into contact with the second contact member (29) when the sliding plate (15) rises, and rotates the hook (20) in the engagement direction. .

(30) is an auxiliary abutting member that projects inward from the bracket (15), and the auxiliary abutting member (3G) is located above the second abutting member (29) and is attached to the sliding plate (15). If the hook (20) is rotated to the disengaged position due to a malfunction during elevation, the second arm (26) will come into contact with the auxiliary contact member (30) as the sliding plate (15) descends. The hook (20) can be rotated into the engagement position.

(31) is a safety cam provided on the elevating member (10), and when the chain (18) breaks, the safety cam (31) engages with the support main body (7) to prevent the elevating platform (5) from descending. It looks like this.

(32) (32) is a column cover that protects the column (2H2).

In the embodiment, the elevating table is raised by extending the cylinder, but the same effect can be obtained even if the elevating table is raised by contracting the cylinder.

The present invention has the above-mentioned configuration. Next, the operation will be explained. First, when the lifting platform is raised from the position shown by the dotted chain line in FIG. 1 to the raised position shown by the solid line, the cylinder (14) is extended by supplying pressure oil. to lower the moving sprocket (16),
The lifting platform (5) is raised via the chain (18).

When the lifting platform (5) reaches the raised position, the guide surface (23) of the hook (20) comes into contact with the locking pin (24), and finally the locking pin (24) is closed as shown in FIG. 9(a). The engaging part (22
) becomes engaged, thereby reliably regulating the direction of contraction of the cylinder (14), and preventing oil leakage etc. from lifting platform (5).
) can be prevented from falling.

Next, when lowering the platform, see Figures 6 and 9 (a).
), slightly extend the cylinder (14).

Ground.

In addition, if the hook (20) is in the disengaged position as shown in FIG. 10 due to malfunction due to lifting after FIG. 9(e), the cylinder (14) is extended, that is, the lifting platform (5) By raising the second arm (26), the second arm (26) comes into contact with the auxiliary contact member (30), and the hook (20) can be rotated to the engagement position, and the hook ( 2
G) can be engaged reliably.

(g) Effect of the invention O) is rotated to the disengagement position and the spring (
27) exceeds the dead point.

Thereafter, as shown in FIG. 9(C), when the cylinder (14) is contracted and the elevator platform (5) is lowered, the second arm (2
6) comes into contact with the second abutting member (29) and rotates the hook (20) to the engagement position as shown in FIG. 9(d), and the spring (27) exceeds the dead point.

When the cylinder (14) is further reduced, the hook (20) rises in the state shown in FIG. Since the hook can be rotated to the locking position or the locking release position by contacting the contacting member and the second contacting member, the operation of the cylinder can be automatically regulated when the lifting platform is in the raised position. , it is possible to reliably prevent the lifting platform from falling due to cylinder damage or the like.

Furthermore, since the restriction can be automatically released when descending, the platform can be smoothly raised and lowered.

[Brief explanation of the drawing]

Figure 1 is an overall side view, Figure 2 is an overall front view, Figure 3 is an enlarged cross-sectional view of the support column, Figure 4 is a sectional view taken along line A-A in Figure 3, and Figure 5 is a cross-sectional view taken along line B-B in Figure 3. Figure 6 is an enlarged view of the lower part of the column, Figure 7 is a cross-sectional view taken along line C-C in Figure 6, Figure 8 is a cross-sectional view taken along line D-D in Figure 7, and Figures 9 and 10 are operating state diagrams. be.

Claims (1)

[Claims] A pair of pillars are erected on the left and right sides of the base, a ceiling cover is provided on the top of the pillars, a lifting platform for mounting on a vehicle is provided between the pair of pillars, and the lifting platform is operated by a cylinder provided on the pillars. In the two-stage parking device for raising and lowering, the free end side of the cylinder is rotatably provided with a hook that engages with a locking pin on the column side when the lifting platform is raised and an arm that is integral with the hook. The hook is constantly biased by a spring provided so as to cross a dead point between the locking position and the unlocking position of the hook, and the hook is held on the support column side by contact with the arm. A safety device for a two-stage parking system, which is provided with a first contact member that rotates to a lock release position and a second contact member that returns a hook to a lock position upon contact with the arm above and below.