JPH028192A - Balance mechanism for wheel load in suspension type telpher - Google Patents

Abstract

PURPOSE:To secure a stable operation for a long period by fixing the support bracket of two sets of the front and back wheels of one side only to a main body frame and linking the wheel support bracket of the other side by one linking beam pivotally supporting the center part on the car body frame in the title telpher used in a warehouse, etc. CONSTITUTION:The wheel 3e of the wheel couples 3a, 3c of the figure upper left side among four wheel couples 3a-3d traveling on the lower end flange of an I type traveling rail 2 is fixed to a main body frame 4 by a supporting bracket 6a respectively. On the other hand, the wheel support bracket 6b of the right side wheel couples 3b, 3d is linked by one connection beam 7 and the center part of the connection beam 7 is pivotally supported on the main body frame 4 via a connection pin 8. In this structure, one part of the wheel couple is linked by a connection beam freely slidably, can be followed up to the inclination caused on the traveling rail and the load is balanced, so a stable traveling can be performed for a long term.

Description

[Detailed Description of the Invention] (Industrial Application Field) An electric hoist or electric chain hoist is suspended from the lower end flange of an I-shaped steel installed on the ceiling of a factory building, warehouse, etc. The movable suspension type Teruha is widely used for handling materials and products in machine factories, and as small-scale cargo handling equipment in warehouses, station premises, etc. because it is easy to handle.

The present invention relates to a wheel load balancing mechanism in such a suspension type Teruha.

(Prior Art) Fig. 10 to Fig. 12 show a conventional Terha, in which Fig. 10 is a front view, Fig. 11 is a right side view, and Fig. 12 is a plan view.

Now, the Teruha 1 has four pairs of wheels 3a, two on the left and right, running on the lower end flanges 2a of the two running rails 2 made of shaped steel.
3b, 3c, and 3d are running. Reference numeral 4 denotes a frame-shaped main body frame, and a hoisting device 5 such as an electric hoist or an electric chain hoist is attached to the main body frame 4.

The main body frame 4 is supported at its upper part by four pairs of wheels via wheel support brackets 6a.

The wheel pair is divided into driving wheels 3a, 3b and driven wheels @3c, 3d. The driving wheels 3a, 3b are driven by a traveling motor 12.
, reducer 13, drive shaft 14, gear 16, wheel side gear 17
Driven through. and the other two pairs of wheels 3c, 3
d is not driven by a driven wheel.

In such a suspension type Teruha, etc., if the Teruha itself has high rigidity and unevenness occurs in the level of the traveling rail 2 due to the installation accuracy of the traveling rail 2 or changes over time (No. 13)
(see figures a and b), four corner wheel pairs 3a, 3b, 3c,
3d do not contact evenly, causing the wheels to rise (for example, wheels 3b and 3c are supported at two points in Fig. 13),
Unbalanced wheel loads may occur, and the driving wheels may not transmit the striking force, causing slips.

Also, if there is a difference in span (see Figure 14 S, 182)
Also, wheel lifting and wheel sagging occur, leading to premature wheel wear.

Due to the above-mentioned problems, it is necessary to increase the strength of each part.

In addition, if the floating of the drive wheels is taken into consideration, it is necessary to increase the number of drive wheel pairs, and if the difference is large, it is necessary to consider the need to move all the pairs.

(Problems to be Solved by the Invention) In view of the problems of the prior art, the present invention attempts to provide a mechanism for balancing the load between a pair of wheels in a suspension type Terha that can ensure stable operation over a long period of time. be.

(Means for Solving the Problems by the Invention) In the Terha, which is provided with four pairs of wheels that run on two parallel running rails so as to sandwich the rails, and suspends the main body frame via a wheel support bracket,
Among the wheel support brackets that support the pair of wheels, only the wheel support brackets corresponding to the two pairs of front and rear wheels that run on the rail on one side are fixed to the main body frame, and the two pairs of front and rear wheels that run on the rail on the other side are fixed to the main body frame. The wheel support brackets corresponding to the pair of wheels were connected by one connecting beam, and the main body frame was pivotally supported at the center of the connecting beam via a connecting pin.

Further, the central portion of one connecting beam and the connecting pin are integrally connected, and the main body frame is pivotally supported with a gap provided so that it can slide in the axial direction of the connecting pin.

Further, for the two pairs of front and rear wheels running on the rail on one side, one pair of wheels is run on the rail on the other side at a position corresponding to the intermediate position of these pair of wheels, and the wheels of the pair of wheels The support bracket was pivotally connected to the main body frame using a connecting pin.

(Example) Fig. 1 is a front view of Terha to which the present invention is applied, Fig. 2 is a right side view, and Fig. 3 is a plan view.

Now, in the Teruha 1 according to the present invention, a total of four wheel pairs 3a, 3b, 3c, and 3d, two on the left and right, run on the lower end flanges 2a of two running rails 2 made of I-shaped steel, as in the conventional type. Reference numeral 4 denotes a frame-shaped main body frame, and hoisting equipment 5 such as an electric hoist or an electric chain hoist is attached to the main body frame 4.

The main body frame 4 has a wheel support bracket 6a at its upper part,
It is supported by a pair of wheels 3 via 6b. As is clear from Fig. 3, the left side of Fig. 3 shows each pair of front and rear wheels 3a, 3c.
The axles 3e are supported by a pair of left and right wheel support brackets 6a, respectively, and the support brackets 6a are fixed to the upper corners of the main body frame 4.

On the other hand, on the right side of FIG. 3, there are two front and rear wheel pairs 3b,
The axles 3e of 3d are each supported by a pair of wheel support brackets 6b, and these front and rear support brackets 6b are connected by one horizontally long connecting beam 7. The connecting beams 7 provided on both sides of the running rail 2 are pivoted to the upper part of the main body frame 4 through a connecting pin 8 at the center thereof. The connecting beam 7 can be moved left and right via a connecting pin 8. As is clear from the figure, an appropriate gap S is provided between the main body frame 4 and the connecting beam 7. The existence of this gap S allows the connecting beam 7 to move laterally. Reference numeral 10 denotes a fixing plate that holds and positions the connecting beam 7 with respect to the connecting pin 8. 11 (FIG. 2) is a stopper provided at the front and rear ends of the connecting beam 7.

As shown in FIG. 1 or 3, two of the four wheel pairs are knocking wheels and the other two are driven wheels.

12 is a motor mounted on the main body frame 4, 13 is a speed reducer, and 14 is a drive shaft, which are connected by, for example, a gear coupling 15. The gear coupling 15 is constructed by meshing an internal spur tooth surface in a coupling case with an external spur gear with a crowned coupling center. In addition, an involute tooth profile is adopted, and the tooth tips and tooth bottoms have a special shape that takes into account lubrication when tilted, so even if there is a slight tilt between the case and the center, constant speed rotation and smooth power transmission are achieved. It is configured as follows.

16 (FIG. 6) is a gear fixed to the drive shaft 14, which meshes with a gear 17 attached integrally or separately to the wheel pair 3 to transmit power.

FIG. 5 shows the driven side, and since there is no drive shaft on this side, the wheel support brackets 6a, 6a are connected by a connecting member 18. Although the wheel base of the wheel pair 3b and 3d on the side of the connecting beam 7 is the same as the wheel base between the wheel pair 3a and 3a on the opposite side, the wheel base of the wheel pair 3b and 3d is not limited to this. may be selected as appropriate.

(Function) A case where a level difference occurs in the traveling rail 2 with the above configuration will be described with reference to FIG. 7.

Assume that a rail level difference δ occurs between the front and rear wheel pairs 3a and 3d in the younger brother 7 diagram. In this case, the connecting beam 7 travels by means of the connecting pin 8 at the center of the connecting beam and follows the inclination of the wheel 2, so that the wheel loads can always be balanced.

Next, as shown in Fig. 14, if the span S2 between the left and right running rails and the span Si of Teruha are different, 1) From the tolerance between the span S1 of Teruha and the span S2 between the running rails, the frame body 4 and the connecting beam The gap S between 7 (Fig. 4) is determined in advance. As shown in Fig. 8, the distance ah between the centers of the traveling rail 2 and the connecting pin 8 is set so that the main body frame 4 can slide smoothly on the connecting pin 8 even if the wheel horizontal force pH acts and the collision Pv occurs. By selecting the dimension Q between the bushes 9 and the friction coefficient of the bushes 9, it is possible to eliminate bumps.

In the above explanation, the front and rear running wheels on one side were connected by a connecting beam 7, and the intermediate part was pivoted on the main body frame with a connecting pin 8. They are connected by connecting pins and can be moved laterally, and Ql and Q are
2, a three-point support method is also possible (Ql,
nz is the distance from the overall center of gravity to the left and right running rails, respectively).

(Effect) The wheel support brackets attached to the front and rear wheels running on one of the two rails are connected by one connecting beam, and the center part of the connecting beam is attached to the upper part of the main body frame. The main body frame is supported at three points by pivoting with connecting pins. This allows the connecting beam to follow the inclination of the running rail, so the load on the wheels can be balanced at all times.

The connecting pin is fixed to the wheel support bracket on both sides, and there is a gap between the wheel support bracket and the main body frame to enable lateral movement of the main body frame, so even if the running rail span and the Teruha span are different, the connecting pin will not work. can be slid laterally to better follow the difference in span dimensions.

[Brief explanation of the drawing]

FIG. 1 is a front view of a suspension type Teruha to which the present invention is applied. Figure 2 is also a right side view. Figure 3 is also a plan view. No. 4 @ is a sectional view taken along the ■ arrow in FIG. FIG. 5 is a sectional view taken in the direction of the ■ arrow in FIG. FIG. 6 is a sectional view taken in the direction of the ■ arrow in FIG. FIG. 7 is an explanatory diagram of the balance function when a level difference occurs in the running rail. FIG. 8 is an explanatory diagram of the Kozeka balance function when the span between the traveling rails and the Teruha span are different. FIG. 9 is an explanatory diagram when the frame body is supported at three points. Figure 10 is a front view of the conventional Teruha. FIG. 11 is a right side view of FIG. 10. FIG. 12 is also a plan view. FIG. 13 is an explanatory diagram when a level difference occurs in a conventional traveling rail. FIG. 14 is an explanatory diagram in the case where the running rail span and the Teruha span are different. In the figure: 1 Terrace 2 Traveling rail 2a Flange 30 Axle 5 Hoisting device 6a, 6b Wheel support bracket 7 Connection beam 8 9 Bushes 10 11 Stopper 12 13 Reducer 14 15 Gear coupling l6 17 Gear 18 3a, 3b, 3c, 3d Wheel 4 Body frame connecting pin fixing plate Traveling motor drive shaft gear connecting member Above Applicant Sumitomo Heavy Industries, Ltd. Sub-agent Patent attorney Isamu Ohashi ψ Figure 7 Figure 8 Figure 13 Figure 14

Claims (1)

[Scope of Claims] 1) In a Terha in which four pairs of wheels are provided that run on two parallel running rails with the rails sandwiched between them, and the main body frame is suspended via a wheel support bracket, the four pairs of wheels are provided. Of the wheel support brackets that support the pair of wheels,
Only the wheel support brackets corresponding to the two pairs of front and rear wheels running on the rail on one side are fixed to the main body frame, and one wheel support bracket corresponding to the two pairs of front and rear wheels running on the rail on the other side is fixed to the main body frame. A wheel load balance mechanism for a suspension type Terha, characterized in that the wheels are connected by a connecting beam, and a main body frame is pivotally supported at the center of the connecting beam via a connecting pin. 2) Claim 1 characterized in that the connecting beam and the connecting pin are integrally connected and are pivotably supported with a gap provided so that the main body frame can slide in the axial direction of the connecting pin.
Wheel load balance mechanism in the suspension type Terha described. 3) For two pairs of front and rear wheels running on one rail, one pair of wheels is run on the other side of the rail corresponding to the intermediate position between these front and rear wheel pairs. 3. The wheel load balance mechanism for a suspension type Teruha according to claim 2, wherein the wheel support bracket is pivotally supported to the main body frame by a connecting pin.