CN1238239C

CN1238239C - Buffer for elevator

Info

Publication number: CN1238239C
Application number: CNB021596212A
Authority: CN
Inventors: 安部贵; 重田政之; 中村秀广
Original assignee: Hitachi Ltd; Hitachi Mito Engineering Co Ltd
Current assignee: Hitachi Ltd; Hitachi Mito Engineering Co Ltd
Priority date: 2001-12-26
Filing date: 2002-12-25
Publication date: 2006-01-25
Anticipated expiration: 2022-12-25
Also published as: TW200301218A; TWI246500B; KR20030055143A; JP3924163B2; JP2003192250A; CN1429758A

Abstract

The object of the present invention is to provide an elevator buffer that ensures stable load-displacement characteristics at a cheaper price and a compact size. The solution of the present invention is an elevator buffer provided at a pit 6 at the lowest section of an elevator hoistway 1 or under a cage 2 for absorbing collision energy of the cage or a counterweight 4. The elevator buffer 7 has a plurality of flanges 7A and thin cylindrical bodies 7B arranged between the flanges 7A. In operating the buffer 7, axially symmetrical, undulating buckling 7C or 7D is generated at the thin cylindrical bodies 7B.

Description

Buffer for elevator

Technical field

The present invention relates to a kind of Buffer for elevator, this energy disperser is arranged on the melt pit of elevator with the bottommost place of stair shaft, perhaps is arranged under the car (car), and absorbs the impact energy of car or its balance weight.

Background technology

Usually need Buffer for elevator (will abbreviate energy disperser as hereinafter) as safety device for elevator, when car or its balance weight poured melt pit under the situation that does not stop at the bottom, this device had with the mean deceleration below about 1G and stops the performance of elevator as the cushion characteristic of guaranteeing passenger safety.Also need energy disperser to prevent to continue above 0.04 second greater than the acceleration/accel of 2.5G.That is, need energy disperser to have to remain stable and prevent the good cushion characteristic that acceleration/accel is excessive.

Traditionally, used energy disperser with following structure according to the size of the specified running velocity of corresponding elevator, wherein for for the elevator that uses in the low-speed region (usually 45-60 rice/minute below), use a spring type energy disperser, for for the lift facility that uses in surpassing the zone of low-speed region, use a hydraulic energy disperser.

The spring type energy disperser is a kind of energy disperser that absorbs impact energy by helical spring elasticity, and the hydraulic energy disperser is a kind of mechanism, this mechanism makes the oil that is sealed in the cylinder produce resistance owing to piston being inserted oil cylinder when buffering, thereby with control brake power the cushion characteristic to realize be scheduled to of control by flow regulating valve.

Yet,,, have the problem of elongating its free height owing to the former mechanical strength reason and the latter's reasons in structure for spring type energy disperser and hydraulic energy disperser.In addition, particularly because the reasons in structure of hydraulic energy disperser can't be avoided the increase of its cost.

In addition, nowadays be badly in need of a kind of melt pit size of compactness, therefore need to reduce the size of energy disperser, especially shorten its free height.Consider these needs, the contriver considers, the different field that a spent fuel transfer cask is used for shock absorber as suggestion in JP-A-50-61581 (1975) and announcement, if can use the energy disperser that is bent into corrugated tube shape vertically, then can provide with traditional spring type and compare the energy disperser that size is little, cost is low with the hydraulic energy disperser.

Now, Buffer for elevator is one of important safety device, and its important part is can stably obtain all the time necessary damping characteristics.That is to say,, also be necessary when a load is applied thereto vertically, can obtain stable load one placement property even utilize the energy disperser of bending.Especially, in order to obtain the displacement stroke of the sizable energy disperser of quantity, be necessary to obtain its continuous and regular corrugated tube shape bending displacement.

Yet, in the above in Jian Yi the example, for example, as shown in Figure 7 and Figure 8, Fig. 7 is that to be used for explanation be on 2 millimeters, not flanged cylinder 10 time when load puts on thickness vertically, the diagrammatic sketch of this cylindrical bending displacement, and Fig. 8 is used for explanation when the bending displacement increases, and the diagrammatic sketch of the relation between load and the displacement is because cylinder 10 is asymmetric at first, distribution in the accumulation bending displacement form, and its load one placement property that distributes.Especially when the displacement stroke that needs one are grown, it is very obvious that this trend can become, in addition, because cylinder 10 is configured to a long and narrow shape, therefore produced the problem of Euler's bending, this problem causes cylinder 10 to be bent to " side direction V-arrangement ", and the load that can bear descends suddenly.Because the cylinder cross-sectional plane flattens suddenly, therefore this phenomenon produces along the mode that a direction dies down with the rigidity of cylinder cross-sectional plane.

In addition, for Buffer for elevator, importantly buffer stroke must be accurately.For example, buffer stroke is elongated above predetermined value in the balance weight side, as design-calculated, is connected to the Jing Ding of the car of balance weight by the close more stair shaft of a hawser, and this is dangerous, because car may bump against Jing Ding under worst case.Usually,, should provide the surplus of some about the miles of relative movement in the stair shaft, yet, owing to be badly in need of compact stair shaft recently, if possible, wish that buffer stroke is no more than setting value.Causing the bending displacement continuously, and allow after crooked part used up, produce a bigger load suddenly, because the distribution in the displacement form is asymmetric owing to cylinder at first, therefore the position of this point of transition is mainly with the structure distribution of above-mentioned example, and is difficult to accurately determine predetermined travel values.In addition, if the energy disperser of advising above is used for elevator, owing to produce excessive acceleration/accel on car between phase buffer, therefore can have the load of larger amt in the incipient stage generation, this is undesirable.

Narrated as top, produce one be difficult to will suggestion energy disperser be used for the problem of Buffer for elevator.

Summary of the invention

The purpose of this invention is to provide a kind of Buffer for elevator, this energy disperser has stable load one placement property, and cost and size are reduced.

In order to realize an aspect of above-mentioned purpose of the present invention, it provides a kind of Buffer for elevator, this energy disperser is arranged on the melt pit of elevator with the bottommost place of stair shaft, perhaps be arranged under its car, and absorb the impact energy of car or its balance weight, it is characterized in that, Buffer for elevator is by a plurality of flanges and be arranged between the respective flanges separately, constitute with respect to its cylinder part that highly has than minimal thickness, and be designed to when it activates as energy disperser, highly have with respect to it on, produce corrugated tube shape bending with axial symmetric pattern than the corresponding cylinder part of minimal thickness, wherein: when causing single gauffer corrugated tube shape bending on the cylinder part that highly has with respect to it than minimal thickness, the scope of 7.0＜h/t＜9.8 in, select highly to have than the thickness t of the cylinder part of minimal thickness and its ratio between the h highly with respect to it.

According to a further aspect in the invention, when causing two gauffer corrugated tube shapes bending on the cylinder part that highly has with respect to it than minimal thickness, the scope of 14＜h/t＜22 in, select highly to have than the thickness t of the cylinder part of minimal thickness and its ratio between the h highly with respect to it.

Preferably, thickness t increases to subordinate's flange from higher level's flange usually.

As from what above understand,, can provide a cheapness and size less energy disperser, and stair shaft is shoaled with the degree of depth of melt pit because therefore the cylindrical body with flange is compared with the hydraulic energy disperser with traditional spring type as energy disperser.In addition, compare with traditional energy disperser, because the size and the weight of energy disperser of the present invention greatly reduces, so energy disperser can be connected the bottom such as car and balance weight, reduce the interior machine of melt pit and the quantity of equipment by this, to strengthen the maintainability of lift facility.

Description of drawings

Fig. 1 is the total structure diagrammatic sketch of elevator, has wherein used Buffer for elevator of the present invention;

Fig. 2 is the front elevation of the Buffer for elevator of one embodiment of the present of invention;

Fig. 3 is the form that shows the size relationship of energy disperser shown in Figure 2;

Fig. 4 is used to illustrate the load when energy disperser shown in Figure 2 activates and the scheme drawing of the relation between the displacement;

Fig. 5 is the scheme drawing that is used to illustrate the deformation form when causing the corrugated tube shape bending on the barrel portion that has with the axial symmetric pattern of two gauffers than minimal thickness;

Fig. 6 is the scheme drawing that is used to illustrate the deformation form when causing the corrugated tube shape bending on the barrel portion that has with the axial symmetric pattern of single gauffer than minimal thickness;

Fig. 7 is that to be used for explanation be on 2 millimeters, not flanged traditional cylinder the time when load is applied to thickness vertically, this cylindrical diastrophic scheme drawing;

Fig. 8 is the scheme drawing that is used for illustrating the load and the relation between the displacement of energy disperser shown in Figure 7.

The specific embodiment

Hereinafter, with the embodiment of accompanying drawings Buffer for elevator of the present invention.

Wherein, Fig. 1 is the total structure diagrammatic sketch of elevator, has wherein used Buffer for elevator of the present invention; Fig. 2 is the front elevation of the Buffer for elevator of one embodiment of the present of invention; Fig. 3 is the form that shows the size relationship of energy disperser shown in Figure 2; Fig. 4 is used to illustrate the load when energy disperser shown in Figure 2 activates and the scheme drawing of the relation between the displacement; Fig. 5 be used to illustrate when with the axial symmetric pattern of two gauffers at scheme drawing with barrel portion up-bow J than minimal thickness deformation form when rippling the tubulose bending; Fig. 6 is the scheme drawing that is used to illustrate the deformation form when causing the corrugated tube shape bending on the barrel portion that has with the axial symmetric pattern of single gauffer than minimal thickness.

In Fig. 1, label 1 is a stair shaft, wherein connects a car 2 and a balance weight 3 by a hawser 4, and raises and reduction car 2 by the rotation of a pulley 5.Label 6 is melt pits that a bottom that is formed on stair shaft I is located, and is provided with energy disperser 7 in melt pit 6.

Fig. 2 shows the ad hoc structure of energy disperser 7, and wherein energy disperser 7 is made of a plurality of cylinder 7B that are provided with the flange 7A of predetermined essence and have than minimal thickness, and each cylinder is arranged between the respective flanges 7A.The internal diameter umbrella d of total length L, barrel portion 7B of energy disperser and the height h between thickness t and flange 7A have been shown among Fig. 3.

The material of energy disperser 7 is annealed aluminiums of JIS A 1050, wherein be provided with six bending segments, and change the thickness of barrel portion gradually, wherein, in the present embodiment, its thickness increases continuously towards subordinate's flange from higher level's flange, its objective is to make the barrel portion 7B continuous modification that has than minimal thickness.In addition, can control its load character by changing thickness.In addition, the h/t ratio under this situation is numerical value 7.2-9.0.

As from Fig. 4 clearly, the figure shows the test results that energy disperser shown in Figure 2 is carried out, can see: in energy disperser 7 of the present invention, the initial activation stage does not produce excessive load, and cause continuous and stable bending, thereby can obtain stable load character.

In addition, can also see: by changing the thickness of barrel portion, average load is increased gradually, and the control load characteristic.Thereby, can design energy disperser 7 with any desired cushion characteristic.In addition, can see: about load one placement property, when displacement increased, load increased suddenly.This is that deformable segment is used up because all cylinder 7B that have than minimal thickness are bent, and this is identical with the state of shorten (turn short) in the spring type energy disperser, so can limit the stroke of this energy disperser 7 with the some A among Fig. 4.Thereby, its stroke can be accurately determined, and car can be in setting value, stopped.

Fig. 5 shows the deformation form when producing corrugated tube shape bending 7C on having than the barrel portion 7B of minimal thickness with the axial symmetric pattern of two gauffers, and Fig. 6 shows the deformation form when producing corrugated tube shape bending 7D on having than the barrel portion 7B of minimal thickness with the axial symmetric pattern of single gauffer.

Wherein, about having than the height h of the barrel portion of minimal thickness and the relation between the thickness t, when having than the corrugated tube shape on the barrel portion of minimal thickness bending for single gauffer and two gauffer, the relation that 7.0＜h/t＜9.8 are preferably arranged when producing corrugated tube shape bending 7D with the axial symmetric pattern of single gauffer produces the relation that 14.0＜h/t＜22 are preferably arranged when corrugated tube shape bends 7C with the axial symmetric pattern of two gauffers.Owing to can obtain the stroke 61 bigger than the stroke under single gauffer corrugated tube shape bending situation 62, therefore two gauffer corrugated tube shapes bendings demonstrate the advantage that surpasses single gauffer corrugated tube shape bending.On the other hand, single gauffer corrugated tube shape bending demonstrates the feature less as shown in Figure 6 with respect to the extension quantity of d in the internal diameter, therefore, demonstrates such as inserting the advantage of a guide cylinder 8 in order to the restriction energy disperser.In addition, in the embodiment of Fig. 6, corrugated tube shape bending 7D is formed on the cylinder outside that has than minimal thickness mostly.

According to top embodiment, can be used as energy disperser owing to have the cylindrical body of flange, therefore compare with the hydraulic energy disperser with traditional spring type, can provide a cheapness and size less energy disperser, and stair shaft is shoaled with the degree of depth of melt pit.In addition, compare with traditional energy disperser, because the size and the weight of energy disperser of the present invention greatly reduce, therefore energy disperser can be connected the bottom such as car and balance weight, reduce the interior machine of melt pit and the quantity of equipment by this, to strengthen the maintainability of lift facility, for example be convenient to the fixing of mobile electric wire.

According to the present invention, can obtain following obvious advantage, wherein owing to have the cylinder basis of flange Body can be used as buffer, therefore compares with the hydraulic buffer with traditional spring type, can provide The buffer that one cheapness and size are littler, and stair shaft is shoaled with the degree of depth of melt pit. In addition, Compare with traditional buffer, because size and the weight of buffer of the present invention greatly reduces, because of This buffer can be connected the bottom such as car and balance weight, reduces by this machine in the melt pit The quantity of device and equipment is to strengthen the maintainability of lift facility.

Claims

1. Buffer for elevator, this energy disperser is arranged on the melt pit of elevator with the bottommost place of stair shaft, perhaps be arranged under its car, and absorb the impact energy of car or its balance weight, it is characterized in that, Buffer for elevator is by a plurality of flanges and be arranged between the respective flanges separately, constitute with respect to its cylinder part that highly has than minimal thickness, and be designed to when it activates as energy disperser, highly have with respect to it on, produce corrugated tube shape bending with axial symmetric pattern than the corresponding cylinder part of minimal thickness, wherein:

When causing single gauffer corrugated tube shape bending on the cylinder part that highly has with respect to it than minimal thickness, the scope of 7.0＜h/t＜9.8 in, select highly to have than the thickness t of the cylinder part of minimal thickness and its ratio between the h highly with respect to it.

2. Buffer for elevator as claimed in claim 1, it is characterized in that, when causing two gauffer corrugated tube shapes bending on the cylinder part that highly has with respect to it than minimal thickness, the scope of 14＜h/t＜22 in, select highly to have than the thickness t of the cylinder part of minimal thickness and its ratio between the h highly with respect to it.

3. Buffer for elevator as claimed in claim 1 is characterized in that, thickness t increases to subordinate's flange from higher level's flange usually.