KR910008010Y1 - Hand pallet truck - Google Patents

Hand pallet truck Download PDF

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Publication number
KR910008010Y1
KR910008010Y1 KR2019890001577U KR890001577U KR910008010Y1 KR 910008010 Y1 KR910008010 Y1 KR 910008010Y1 KR 2019890001577 U KR2019890001577 U KR 2019890001577U KR 890001577 U KR890001577 U KR 890001577U KR 910008010 Y1 KR910008010 Y1 KR 910008010Y1
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South Korea
Prior art keywords
needle
hydraulic circuit
circuit
pallet truck
pressure
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KR2019890001577U
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Korean (ko)
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KR900015707U (en
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김정배
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주식회사 수성산업운반기계
김정배
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Priority to KR2019890001577U priority Critical patent/KR910008010Y1/en
Publication of KR900015707U publication Critical patent/KR900015707U/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B5/00—Accessories or details specially adapted for hand carts
    • B62B5/0006—Bumpers; Safety devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
    • B62B3/04—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment
    • B62B3/06—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment for simply clearing the load from the ground
    • B62B3/0618—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment for simply clearing the load from the ground using fluid lifting mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2207/00—Joining hand-propelled vehicles or sledges together
    • B62B2207/04—Forklift trucks with wheeled pallets

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Handcart (AREA)

Abstract

내용 없음.No content.

Description

핸드 팔레트 트럭과 과적(過積)방지장치Hand Pallet Trucks and Overload Protection

제1도는 본 고안의 과적장치가 설치된 핸드 팔레트 트럭의 실시상태를 나타낸 측면도.1 is a side view showing an embodiment of the hand pallet truck is installed with the overload device of the present invention.

제2도는 본 고안의 복귀회로를 개폐하는 니들부에 대한 분해 사시도.Figure 2 is an exploded perspective view of the needle portion for opening and closing the return circuit of the present invention.

제3도는 본 고안의 과적장치가 설치되어 그 작동상태를 나타낸 펌핑블록에 대한 횡 단면도.Figure 3 is a transverse cross-sectional view of the pumping block showing the operating state of the overload device of the present invention is installed.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 펌핑블럭 32: 오일탱크실1: Pumping Block 32: Oil Tank Room

33 : 승강램실린더 101 : 니들밸브케이싱33: lifting ram cylinder 101: needle valve casing

104 : 압력조절밸브 105 : 압력조절스프링104: pressure regulating valve 105: pressure regulating spring

106 : 니들 S : 니즐밸브조합체106: needle S: needle valve assembly

H1: 수평유압회로 H3: 수평유압회로H 1 : horizontal hydraulic circuit H 3 : horizontal hydraulic circuit

H5: 복귀회로H 5 : return circuit

본 고안은 핸드 팔래트 트럭자체의 유압회로내에 과적방지장치를 설치하여 사용자의 의도와는 무관하게 기계적으로 적재적량을 준수 할 수 있도록 하는 핸드 팔래트 트럭의 과적장치에 관한 것이다.The present invention relates to an overload device of a hand pallet truck that can be installed in the hydraulic circuit of the hand pallet truck itself so that the load capacity can be mechanically observed regardless of the user's intention.

종래의 지게차에는 과적방지장치가 부설되어 있지 아니해서, 각종 화물을 들어 올리고 운반할 때, 적재량의 중량을 가능할 수 없기 때문에 대부분 목측에 의하여 운반하게 되므로, 프레임 베드에 의하여 들어 올려지는 화물이 리프팅 캐퍼시티(lipting capocity)를 초과하게 되고, 또한 이와같이 과적화물을 반복적으로 들어 올리고 운반하는 과저에서 팔래트 트럭에 기계적인 부하를 과중하게 되므로, 빈번한 고장으로 인한 화물 운반작업에 막대한 지장을 초래하였다.Conventional forklifts are not equipped with an overload prevention device, and when lifting and transporting various cargoes, most of them are carried by the neck because the weight of the load cannot be possible, so that the cargo lifted by the frame bed is lifting capacity. It also exceeds the lipting capocity and in this way the heavy load on the pallet truck in the overload of repeatedly lifting and transporting the overload, which has caused enormous disruption to the cargo handling task due to frequent failures.

이와같은 폐단을 시정하기 위하여 안출한 본 고안은, 니들밸브케이싱내에 압력조절스프링이 탄력설치된 니들을 끼워넣으되, 니들의 선단부는 복귀회로를 폐쇄하도록 하므로서, 과적시에는 수평유압회로내의 작동유체가 압축되므로, 이 수평유압회로내의 작동유체의 압축에 의하여 복귀회로를 폐쇄하고 있던 니들을 밀어내면서 복귀회로는 폐쇄상태 에서 열린상태로 변환하기 때문에, 작동유체는 니들 밸브케이싱내로 인입되고, 또한 수평유압회로를 거쳐서 오일유통공으로 들어가서 바이패스밸브측에는 상당량의 배압(背壓)이 작용하여 보올을 압지하게 되고, 또한 오일탱크실내의 작동유체는 승강램 실린더내로 대부분 유출하게 되므로, 오일탱크실내로의 작동유체의 유입이 용이하여 니들은 다시 복귀회로를 폐쇄하는 과정으로 팔레트 트럭의 과적을 방지할 수 있도록 되어 있는바, 첨부도면에 의하여 구성 및 작용효과를 상술하면 다음과 같다.The present invention, which is designed to correct such closed end, inserts a needle in which a pressure regulating spring is elastically installed in the needle valve casing, but the tip end of the needle closes the return circuit, so that the working fluid in the horizontal hydraulic circuit Since it is compressed, the working fluid is drawn into the needle valve casing because the return circuit is switched from the closed state to the open state while pushing out the needle closing the return circuit by the compression of the working fluid in the horizontal hydraulic circuit. Through the circuit, it enters the oil distribution hole and a large amount of back pressure is applied to the bypass valve side to press the ball, and the working fluid in the oil tank chamber is mostly discharged into the lifting ram cylinder. Since the fluid is easy to flow in, the needle closes the return circuit. It is to be able to prevent the enemy, the configuration and operation effects by the accompanying drawings in detail as follows.

제1도는 본 고안의 장치가 부설되는 핸드 팔레트 트럭을 도시하는 것으로 그 개괄적인 구성은 유압회로가 내장된 펌핑블럭(1) 상면에 펌프(2)와 실린더(3)를 부설하고, 이들과 서로 작동되는 핸들(4)과 프레임헤드(5) 및 프레임베드(6)를 일체로 장착하여 핸들(4)을 점선으로 표시된 위치로 반복작동시켜 펌프(2)의 펌핑작동에 의한 작동유체의 유압상승에 따라 펌핑블럭(1)내에 구성되어 있는 유압회로를 통하여 실린더(3)의 중심축상에 접동가능케 기밀히 삽설된 승강램(31)을 상승 시킴으로써 이에 일체로 부설된 프레임베드(6)를 점선으로 도시된 위치로 상승시키는 구조로 되어 있다.1 shows a hand pallet truck on which the device of the present invention is mounted, the general configuration of which is provided with a pump (2) and a cylinder (3) on the upper surface of the pumping block (1) with a built-in hydraulic circuit, By operating the handle 4, the frame head 5, and the frame bed 6 integrally, the handle 4 is repeatedly operated to the position indicated by the dotted line to increase the hydraulic pressure of the working fluid by the pumping operation of the pump 2 By raising the lifting ram 31 slidably inserted on the central axis of the cylinder 3 through a hydraulic circuit constituted in the pumping block 1, the frame bed 6 integrally attached thereto is dotted. The structure is raised to the position shown.

제3도는 펌핑블럭(1)에 대한 확대횡단면도로서, 그 내부에 한조의 체크밸브(C)와 바이패스밸브(B)가 서로 작동해서 선택적으로 체크밸브로서의 기능을 상실토록하는 한벌의 수평유압회로(H1)(H2)(H3)가 설치되어 있기 때문에 승강램(31)의 상승 또는 하강작용이 가능하도록 되어 있으며, 제1도에 도시된바와 같이 핸들(4)을 먼저 점선으로 도시된 위치에서 실선으로 도시된 위치로 작동시키면 제3도에 도시된 바와 같이 펌프(2)의 피스턴실(21)내에는 피스턴(도시하지않음)의 상승에 따라 흡입력이 발생되고 이에 따라 실린더(3)의 내벽에 형성된 오일탱크실(32)의 작동유체는 오일탱크실(32)과 수직으로 연통되는 수직유압회로(V1)와 수평유압회로(H1)를 통하여 바이패스밸브(B)내로 오일유통공(87),을 통해 유입된후 볼(85)을 밀고 올라가 수평유압회로(H2) 및 수직유압회로(V2)를 거쳐 피스턴실(21)내로 흡입되며, 그경로는 점선으로 도시된 화살표와 같다.3 is an enlarged horizontal cross-sectional view of the pumping block 1, in which a set of check valves C and a bypass valve B operate together to selectively lose a function as a check valve. (H 1 ) (H 2 ) (H 3 ) is installed so that the lifting ram 31 can be lifted or lowered, and as shown in FIG. 1, the handle 4 is first shown as a dotted line. In operation, the suction force is generated in accordance with the rise of the piston (not shown) in the piston chamber 21 of the pump 2 as shown in FIG. The working fluid of the oil tank chamber 32 formed on the inner wall of the tank is passed into the bypass valve B through the vertical hydraulic circuit V 1 and the horizontal hydraulic circuit H 1 , which communicate with the oil tank chamber 32 vertically. After flowing through the oil distribution hole (87), the ball (85) is pushed up to the horizontal hydraulic circuit (H 2 ) and It is sucked into the piston chamber 21 via the vertical hydraulic circuit V 2 , the path of which is like an arrow shown by a dotted line.

이때, 핸들(4)을 제1도에 도시된 바와 같이 점선으로 도시된 위치로 다시 눌러주면 피스턴실(21)내에는 압출력이 발생되므로 피스턴실(21)내부에 유입되어 있던 작동유체는 수직유압회로(V2) 및 수표유압회로(H2)를 통해 체크밸브(C)내로만 유입된다.At this time, when the handle 4 is pressed again to the position shown by the dotted line as shown in FIG. 1, the extrusion force is generated in the piston chamber 21, and thus the working fluid introduced into the piston chamber 21 is vertical It flows into the check valve C only through the hydraulic circuit V 2 and the check hydraulic circuit H 2 .

이 과정에서는 바이패스밸브(B)의 볼(85)이 체크밸브의 기능을 수행하고 있기 때문이다.This is because the ball 85 of the bypass valve B performs the function of a check valve in this process.

따라서, 유출된 작동유체는 체크밸브(C)의 하부오일유통공(98)을 통하여 체킹볼(95)을 밀고올라가 상부오일유통공(97)을 통하여 수평유압회로(H3)와 수직유압회로(V3)를 거쳐 승강램 실린더(33)내로 압입되어서 승강램(31)을 상승시키게 되는 것이며, 그 경로는 일점쇄선으로 도시된 바와 같다.Therefore, the leaked working fluid pushes the checking ball 95 through the lower oil flow hole 98 of the check valve C, and then the horizontal hydraulic circuit H 3 and the vertical hydraulic circuit through the upper oil flow hole 97. It is pressed into the lifting ram cylinder 33 via V 3 to raise the lifting ram 31, and the path is as shown by the dashed-dotted line.

이때 승강램(31)의 상승과정에서 핸들(4)에 작용되는 힘이 충분하다면 프레임베드(6)에 적재된 화물의 하중이 과도하더라도 체크밸브(C)와 바이패스밸브(B)의 체크밸브로서의 기능만 보장되면 원래의 설계용량보다 과도한 하중이 부과 되더라도 핸드 팔레트트럭의 리프팅 기능은 수행이 가능하다.At this time, if the force applied to the handle 4 during the lifting of the lifting ram 31 is sufficient, even if the load of the cargo loaded on the frame bed 6 is excessive, the check valve of the check valve (C) and the bypass valve (B) As long as the function is guaranteed, the lifting function of the hand pallet truck can be performed even if an excessive load is applied than the original design capacity.

승강램실린더(33)와 연통되는 수평유압회로(H3)와 오일탱크실(32)과 연통되는 수평유압회로(H1) 사이에 복귀회로(H5)를 개설하되, 수평유압회로(H1)측과 연결되는축의 복귀회로(H5)의 내경은 수평유압회로(H3)측과 연결되는 축의 내경보다 크개형성하여 이를 니들밸브케이싱(101)으로 사용하고 여기에 니들밸브조합체(5)를 내설하는 것으로서, 이를 더욱 상세히 설명하면 다음과 같다.A return circuit H 5 is provided between the horizontal hydraulic circuit H 3 communicating with the lifting ram cylinder 33 and the horizontal hydraulic circuit H 1 communicating with the oil tank chamber 32, but the horizontal hydraulic circuit H 1 ) The inner diameter of the return circuit (H 5 ) of the shaft connected to the side is larger than the inner diameter of the shaft connected to the horizontal hydraulic circuit (H 3 ) side and used as the needle valve casing 101, and the needle valve combination (5) ), Which is explained in more detail as follows.

본 고안의 니들밸브조합체(S)는 펌핑블럭(1)의 외측으로 부터 니들벨브케이싱(101)내에 니들(106)과 압력조절스프링(105), 압력조절볼트(104), 커버링(103), 및 클랭핑볼트(102)의 순서로 안쪽끼우기를 하되, 니들밸브케이싱(101)의 하부 안쪽둘레에는 나선부(107)가 설치되어 있어서 클랭핑볼트(102)와 압력조절볼트(104)가 나사붙임이 되어있다.Needle valve assembly (S) of the present invention is a needle 106, pressure regulating spring 105, pressure regulating bolt 104, covering 103, in the needle valve casing 101 from the outside of the pumping block (1) And the inside of the clamping bolt 102 in the order, but the inner inner circumference of the needle valve casing 101 is provided with a spiral portion 107, the clamping bolt 102 and the pressure adjusting bolt 104 is screwed It is attached.

한편, 클램핑볼트(102) 및 러버팅(103)은 니들밸브케이싱(101)내의 기밀을 유지하기 위하여 나사붙임이 되어 있으며, 압력조절볼트(104)는 이를 적절해 전후진시켜 압력조절스프링(105)의 탄발력을 적절히 가감함으로써 압력조절스프링(105)에 탄력설치되어 있는 니들(106)의 개폐력을 조절할 수 있다.On the other hand, the clamping bolt 102 and the rubber 103 is screwed to maintain the air tightness in the needle valve casing 101, the pressure adjusting bolt 104 is appropriately advanced back and forth to adjust the pressure adjustment spring (105) By appropriately adding or reducing the elasticity of the force) can be adjusted the opening and closing force of the needle 106 is elastically installed in the pressure regulating spring (105).

미설명부호 108은 육각렌지 삽입구이다.Reference numeral 108 is a hexagon socket insertion hole.

이때, 니들밸브케이싱(101) 일측의 니들(106)선단부와 서로 맞물리는 부분의 복귀회로(H5)는 밸브시이트(Valve seat)로써의 기능을 가재게 된다.At this time, the return circuit (H 5) of the needle engaging portion 106 and the distal end portion fit to each other on one side a needle valve housing 101 is to function as a valve seat of the household (Valve seat).

본 고안은 압력조절스프링(105)의 일측은 압력조절볼트(104)에 탄력설치되고, 그 타측에는 니들(106)의 후측단부가 끼워지게 되며, 니들(106)의 선단부는 밸브시이트의 기능을 가지는 복귀회로(H5)에 끼워지게 된다.According to the present invention, one side of the pressure regulating spring 105 is elastically installed on the pressure adjusting bolt 104, and the other end of the pressure regulating spring 104 is fitted to the rear end of the needle 106, and the tip of the needle 106 functions as a valve seat. The branch is fitted into the return circuit H 5 .

이때, 원추형상의 니들(106)의 바깥둘레는 니들밸브케이싱(101)의 안쪽둘레보다 다소적게 형성되어 있으므로, 수평유압회로(H3)축에 과도한 작동유체가 충만되어 그 유압이 니들(106)에 가압 되어서 압력조절스프링(105)의 탄발력을 초과하게 되면 니들(106)은 가상선으로 도시 된 위치로 후진하게되고 이로인하여, 니들(106)에 의해 폐쇄되어 있던 복귀회로(H5)가 개방되어 니들(106)과 니들밸브케이싱(101)사이의 간극으로 작동유체가 유입되게된다.At this time, since the outer circumference of the needle-like needle 106 is formed somewhat less than the inner circumference of the needle valve casing 101, the hydraulic fluid is filled with the excess hydraulic fluid in the horizontal hydraulic circuit (H 3 ) shaft When the pressure is exceeded and the elastic force of the pressure regulating spring 105 is exceeded, the needle 106 is moved backward to the position shown by the virtual line, whereby the return circuit H 5 closed by the needle 106 is closed. The opening is such that the working fluid flows into the gap between the needle 106 and the needle valve casing 101.

유입된 작동유체는 수평유압회로(H1)를 통하여 오일탱크실(32)로 환수되는데 이는, 바이패스밸브(B)축에는 상당량의 배압(Back Pressure)이 작용되어 볼(85)를 위로 밀어 있는데 반하여, 오일탱크실(32) 내에는 대부분의 작동유체가 승강램실린더(33)내로 유출되어 있는 상태 이므로, 오일탱크실(32)로의 유입이 용이하기 때문이다.The introduced working fluid is returned to the oil tank chamber 32 through the horizontal hydraulic circuit (H 1 ), which has a large amount of back pressure applied to the bypass valve (B) shaft to push the ball 85 upward. On the other hand, since most of the working fluid in the oil tank chamber 32 is discharged into the lifting ram cylinder 33, it is because the inflow into the oil tank chamber 32 is easy.

한편, 승강램실린더(33)내의 작동유체가 어느정도 복귀회로(H5)를 거쳐서 오일탱크실(32)로 환수되면 (즉, 승강램실린더(33) 내부의 압력이 규정된 리프팅 캐퍼시티 및 압력조절스프링(105)의 탄발력과 동등하게 되면) 니들(106)은 다시 원위치로 복귀되어 복귀회로(H5)를 폐쇄하게 되므로 승강램실린더(33)내부의 압력은 항상 규정된 압력을 유지케되어 과적을 방지케되는 것이다.On the other hand, when the lifting ram cylinder water exchange with the oil tank chamber 32 the working fluid through a somewhat return circuit (H 5) in 33 (that is, the inside lifting ram cylinder 33 the pressure regulation lifting capacity and pressure control When the needle 106 is returned to its original position and closes the return circuit H 5 , the pressure inside the lifting ram cylinder 33 is always maintained at the prescribed pressure. It will prevent overloading.

이때, 압력조절스프링(105)은 제작시에 리프링캐퍼시티에 맞도록 탄발력이 조절되어 있으나, 가공오차 또는 열처리의 잘못등에 의한 탄발력의 차이를 미세하게 보정해 줄수 있는 수단이 강구 되어야하는바, 그 수단으로 채택되는 것이 압력조절볼트(104)이다.At this time, the elastic force is adjusted to fit the lifting capacity when the pressure control spring 105 is manufactured, but a means for finely compensating the difference in the elastic force due to processing error or heat treatment error should be taken. The pressure adjusting bolt 104 is adopted as the means.

즉, 압력조절볼트(104)는 나선부(107)에 나사붙임이 되어있으므로, 육간렌치를 렌치삽입구(108)에 삽입하여 이를 적절히 회전시켜주면 나선부(107)를 따라 미량씩 전후진하게되고 결국, 압려조절스프링(105)의 탄발력을 적절히 가감하여 줌수 있게 되는 것이다.That is, since the pressure adjusting bolt 104 is screwed on the spiral portion 107, inserting the interlayer wrench into the wrench insertion hole 108 and rotating it appropriately, it moves back and forth slightly along the spiral portion 107 and eventually , The elasticity of the pressure adjustment spring 105 can be appropriately added or subtracted to zoom.

이상과 같은 구성 및 작용효과를 지니는 본 고안의 장치는 그 구성의 간편함과 작용효과면에서도 핸드팔래트 트럭의 과적을 미연에 완벽하게 방지하여 수명을 배가시킴과 동시에 이에 따른 불측의 사고를 예방할 수 있는 매우 실용적인 고안인 것이다.The device of the present invention having the configuration and action effects as described above can prevent overload of hand pallet truck completely in advance in terms of simplicity and action effect of the structure, which can double life and prevent accidental accidents. It is a very practical design.

Claims (1)

일균의 유압회로가 내장된 공지의 핸드 팔레트 트럭의 펌핑블럭(1)에 니들밸브조합체(S)를 부설하여 과적방지 기능을 부여 함에 있어서, 승강램실린더(33)와 연통되는 수명유압회로(H3)와 오일탱크실(32)과 연통되는 수평유압회로(H1)를 직결하는 복귀회로(H5)를 설치하고, 복귀회로(H5)를 개폐하는 니들(106)이 니들밸브 케이싱(101)내부에 압력조절스프링(105)과 압력조절밸브(104)과 같이 설치함을 특징으로 하는 핸드 발태 트럭의 과적방지 장치.In the pumping block 1 of the known hand pallet truck having a built-in hydraulic circuit, a needle valve assembly S is provided to provide an overload prevention function, thereby providing a life hydraulic circuit communicating with the lifting ram cylinder 33. 3 ) and a return circuit H 5 directly connecting the horizontal hydraulic circuit H 1 communicating with the oil tank chamber 32, and the needle 106 for opening and closing the return circuit H 5 is a needle valve casing ( 101) The overload prevention device of the hand-carrying truck, characterized in that installed inside the pressure control spring (105) and the pressure control valve (104).
KR2019890001577U 1989-02-16 1989-02-16 Hand pallet truck KR910008010Y1 (en)

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KR2019890001577U KR910008010Y1 (en) 1989-02-16 1989-02-16 Hand pallet truck

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KR2019890001577U KR910008010Y1 (en) 1989-02-16 1989-02-16 Hand pallet truck

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KR900015707U KR900015707U (en) 1990-09-01
KR910008010Y1 true KR910008010Y1 (en) 1991-10-10

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