JPS6317663Y2 - - Google Patents
Info
- Publication number
- JPS6317663Y2 JPS6317663Y2 JP11715783U JP11715783U JPS6317663Y2 JP S6317663 Y2 JPS6317663 Y2 JP S6317663Y2 JP 11715783 U JP11715783 U JP 11715783U JP 11715783 U JP11715783 U JP 11715783U JP S6317663 Y2 JPS6317663 Y2 JP S6317663Y2
- Authority
- JP
- Japan
- Prior art keywords
- small
- oil chamber
- receiving surface
- pressure
- capacity oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000006835 compression Effects 0.000 claims description 17
- 238000007906 compression Methods 0.000 claims description 17
Description
【考案の詳細な説明】
本考案は、電線の圧縮接続等に用いられる手動
式の油圧圧縮工具の改良に関するものである。[Detailed Description of the Invention] The present invention relates to an improvement of a manual hydraulic compression tool used for compression connection of electric wires, etc.
従来この種の油圧圧縮工具としては、ラムに大
受圧面と小受圧面とを設けると共に、これに対応
して本体に、大受圧面を押出す大容量油室と、小
受圧面を押出す小容量油室とを設け、両油室を油
圧ポンプへ連通させると共に、大容量油室と油圧
ポンプとの間には油圧が一定値に達した後に開く
リリーフ弁を介在させ、先に小容量油室へ低圧油
を送つてラムを早送りした後、大容量油室へ高圧
油を送つて圧縮動作させるようにするものが提案
されている。 Conventionally, this type of hydraulic compression tool has a ram equipped with a large pressure receiving surface and a small pressure receiving surface, and correspondingly, a large capacity oil chamber that pushes out the large pressure receiving surface and a small pressure receiving surface in the main body. A small capacity oil chamber is provided, and both oil chambers are communicated with the hydraulic pump, and a relief valve that opens after the oil pressure reaches a certain value is interposed between the large capacity oil chamber and the hydraulic pump, and the small capacity oil chamber is connected to the hydraulic pump first. A system has been proposed in which low-pressure oil is sent to the oil chamber to rapidly move the ram, and then high-pressure oil is sent to the large-capacity oil chamber for compression operation.
しかしながら、このような工具においては、大
容量油室へ高圧油を送る際に、リリーフ弁を開く
圧力が必要であるため、ポンプからはラムの圧縮
動作圧力にリリーフ弁開放圧力を加えた余分の出
力油圧を出さねばならないという問題点がある。 However, in such tools, pressure is required to open the relief valve when sending high-pressure oil to the large-capacity oil chamber, so the pump generates an extra pressure equal to the ram compression operating pressure plus the relief valve opening pressure. There is a problem in that output oil pressure must be produced.
本考案は、従来の油圧圧縮工具のこのような問
題点に着目してなされたもので、大容量油室と小
容量油室との間に、小受圧面が所定距離押出され
た後開通する連通孔を設け、連通孔開通後はリリ
ーフ弁を介さずに大容量油室へ送油可能とするこ
とにより上記問題点を解決することを目的として
いる。 The present invention was developed by focusing on these problems of conventional hydraulic compression tools, and is designed to open after a small pressure-receiving surface is pushed out a predetermined distance between a large-capacity oil chamber and a small-capacity oil chamber. It is an object of the present invention to solve the above-mentioned problems by providing a communication hole and making it possible to send oil to a large-capacity oil chamber without using a relief valve after the communication hole is opened.
以下図について本考案の実施例を説明する。第
１図において、先端部に圧縮ダイスＤを保持した
ラム１は筒状の大径部２と、この大径部２内にこ
れと一体または別体に設けられた小径部３とを有
する。この実施例において小径部３は、大径部２
と別体の棒ピストン状で、先端が大径部受圧面２
ａに接している。 Embodiments of the present invention will be described below with reference to the figures. In FIG. 1, a ram 1 holding a compression die D at its tip has a cylindrical large-diameter portion 2 and a small-diameter portion 3 provided within the large-diameter portion 2, either integrally or separately. In this embodiment, the small diameter section 3 is the large diameter section 2.
It is a separate rod-piston type with a large diameter pressure receiving surface 2 at the tip.
It is in contact with a.
本体４には大容量油室としての大径ラムシリン
ダ５と、この大径ラムシリンダ５内に突設された
小容量油室としての小径ラムシリンダ６とを有す
る。大径ラムシリンダ５には、大受圧面２ａをも
つラム大径部２が、また小径ラムシリンダ６には
小受圧面３ａをもつ小径部３が夫々挿入されてい
る。そして、大径ラムシリンダ５と小径ラムシリ
ンダ６とは、連通孔７により連通されている。こ
の連通孔７は、小受圧面３ａが所定距離（この実
施例において全ストロークの4/5の位置まで）小
径ラムシリンダ６から押出された後開通する位置
に設けられている。大径ラムシリンダ５は油通路
により、リリーフ弁８、吐出弁９を介してポンプ
１０に連通している。また大径ラムシリンダ５
は、吸入油通路により吸入弁１３を介して直接油
タンク１２を連通している。小径ラムシリンダ６
は、油通路により、吐出弁９を介してポンプ１０
に連通している。１４はチエツク弁である。小径
ラムシリンダ６とラム１の大径部２との間には押
ばね１５が介設され、これによりラム１は常時引
込方向へ付勢されている。 The main body 4 has a large-diameter ram cylinder 5 as a large-capacity oil chamber, and a small-diameter ram cylinder 6 as a small-capacity oil chamber projecting inside the large-diameter ram cylinder 5. A ram large diameter portion 2 having a large pressure receiving surface 2a is inserted into the large diameter ram cylinder 5, and a small diameter portion 3 having a small pressure receiving surface 3a is inserted into the small diameter ram cylinder 6, respectively. The large diameter ram cylinder 5 and the small diameter ram cylinder 6 are communicated with each other through a communication hole 7. This communication hole 7 is provided at a position that opens after the small pressure receiving surface 3a is pushed out from the small diameter ram cylinder 6 by a predetermined distance (up to 4/5 of the total stroke in this embodiment). The large diameter ram cylinder 5 communicates with a pump 10 via a relief valve 8 and a discharge valve 9 through an oil passage. Also, large diameter ram cylinder 5
is in direct communication with the oil tank 12 via the suction valve 13 through the suction oil passage. Small diameter ram cylinder 6
is the pump 10 via the discharge valve 9 through the oil passage.
is connected to. 14 is a check valve. A push spring 15 is interposed between the small-diameter ram cylinder 6 and the large-diameter portion 2 of the ram 1, so that the ram 1 is always urged in the retracting direction.
次に作用を説明する。ポンプ１０のプランジヤ
１０ａが図示しないハンドルの上下動に連動して
上下動すると、油はタンク１２から吸入弁１１を
介して吸入され、吐出弁９を介して押出される
が、リリーフ弁８は油が所定圧になるまで開かな
い（第１図）。このため油は小径ラムシリンダ６
内に送られ、ばね１５を圧縮しつつラム３が低圧
で早送りされ、ダイスＤが電線を挟む。ラム３が
早送りされる際、大径ラムシリンダ５内には、吸
入弁１３を介して油タンク１２から直接油が吸入
される。さらに連続してハンドルを上下動させて
ポンプ１０を動作させると、油圧が高まり、所定
油圧に達したところで第２図の如く、リリーフ弁
８が開き、大径ラムシリンダ５内に高圧の油が送
り込まれる。これにより電線の高圧圧縮が始ま
る。そして、小径ラムシリンダ３がさらに進む
と、第３図の如く、連通孔７が開通し、ポンプ１
０からの高圧油は、今度は小径ラムシリンダ６、
連通孔７を介して大径ラムシリンダ５内に送ら
れ、さらに圧縮が進行する。この間リリーフ弁８
は働かず、従つてポンプ１０からの油圧はリリー
フ弁８を押開くために使われることなく、全て圧
縮力として使用されることとなる。これをポンプ
作動力の見地より見ると、連通孔７の開通によ
り、ポンプ作動力はリリーフ弁８の押開き力の分
だけ軽減されることとなる。即ち、例えば、連通
孔７開通前において、ラム１に700Kgｆ／cm2の圧
力を得る場合、リリーフ弁８のリリーフ圧力が
200Kgｆ／cm2であるとすると、ポンプ１０の圧力
は、700Kgｆ／cm2（ラム圧力）＋200Kgｆ／cm2（リ
リーフ圧力）＝900Kgｆ／cm2となるのに対し、連通
孔７開通後においては、リリーフ弁８のリリーフ
圧力200Kgｆ／cm2が不要となるため、ポンプ１０
の圧力はラム圧力と等しい700Kgｆ／cm2で足りる
こととなる。 Next, the effect will be explained. When the plunger 10a of the pump 10 moves up and down in conjunction with the up and down movement of a handle (not shown), oil is sucked in from the tank 12 through the suction valve 11 and pushed out through the discharge valve 9. It will not open until the pressure reaches a certain level (Fig. 1). Therefore, the oil is in the small diameter ram cylinder 6.
The ram 3 is rapidly moved at low pressure while compressing the spring 15, and the die D pinches the wire. When the ram 3 is rapidly fed, oil is directly sucked into the large diameter ram cylinder 5 from the oil tank 12 via the suction valve 13. When the pump 10 is operated by continuously moving the handle up and down, the oil pressure increases, and when it reaches a predetermined oil pressure, the relief valve 8 opens as shown in FIG. sent. This begins high-pressure compression of the wire. When the small diameter ram cylinder 3 advances further, the communication hole 7 opens and the pump 1
The high pressure oil from 0 is now transferred to the small diameter ram cylinder 6,
It is sent into the large-diameter ram cylinder 5 through the communication hole 7, and compression proceeds further. During this time, relief valve 8
does not work, therefore, the hydraulic pressure from the pump 10 is not used to push open the relief valve 8, but is entirely used as compression force. Looking at this from the perspective of the pump operating force, opening the communication hole 7 reduces the pump operating force by the force of pushing the relief valve 8 open. That is, for example, when obtaining a pressure of 700 kgf/cm 2 in the ram 1 before the communication hole 7 is opened, the relief pressure of the relief valve 8 is
Assuming that the pressure is 200Kgf/cm 2 , the pressure of the pump 10 is 700Kgf/cm 2 (ram pressure) + 200Kgf/cm 2 (relief pressure) = 900Kgf/cm 2 , whereas after the communication hole 7 is opened, Since the relief pressure of 200Kgf/cm 2 of the relief valve 8 is not required, the pump 10
The pressure of 700 kgf/cm 2 , which is equal to the ram pressure, is sufficient.
第４図には他の実施例を示す。この場合大容量
油室としての大径ラムシリンダ５と小容量油室と
しての小径ラムシリンダ６とを連通するための連
通孔７′はラム小径部３に穿たれている。ラム小
径部３が所定距離進行すると、連通孔７′が大径
ラムシリンダ５に開口し、ポンプ１０からの油
は、リリーフ弁８を経ることなく、小径ラムシリ
ンダ６、連通孔７′を経て大径ラムシリンダ５内
に送られ圧縮動作が行わわれる。図示しないが、
連通孔７′の形状は種々考えられる。例えばこれ
は、溝型であつてもよいし、ラム小径部３にテー
パをつける形式のものであつてもよい。 FIG. 4 shows another embodiment. In this case, a communication hole 7' is bored in the ram small diameter portion 3 for communicating between the large diameter ram cylinder 5 as a large capacity oil chamber and the small diameter ram cylinder 6 as a small capacity oil chamber. When the ram small-diameter portion 3 advances a predetermined distance, the communication hole 7' opens to the large-diameter ram cylinder 5, and the oil from the pump 10 passes through the small-diameter ram cylinder 6 and the communication hole 7' without passing through the relief valve 8. It is sent into the large diameter ram cylinder 5 and compressed. Although not shown,
Various shapes of the communication hole 7' can be considered. For example, this may be of a groove type or may be of a type in which the ram small diameter portion 3 is tapered.
以上説明してきたように、本考案は、圧縮ダイ
スＤを保持するラム１を本体４内の油圧により移
動させる油圧工具において、ラム１に、大受圧面
２ａと小受圧面３ａとを設けると共に、本体４内
に大受圧面２ａを押し出す大容量油室５と、小受
圧面３ａを押し出す小容量油室６とを設け、大容
量油室５および小容量油室６を夫々油圧ポンプ１
０に連通し、かつ大容量油室５にはポンプ油圧が
一定以上に高まると開くリリーフ弁８を介在さ
せ、また大容量油室５と小容量油室６との間に、
小受圧面３ａが所定距離押出されたとき開通する
連通孔７，７′を設けた構成としたため、早送り
が可能で作業を迅速に進めることができ、また圧
縮時に油をリリーフ弁８を通さずに、連通孔７，
７′にバイパスさせて大容量油室５に送ることに
より、リリーフ弁８のリリーフ圧力を不要とし
て、ポンプ１０の作動力を軽減して作業を楽にす
ることができるという効果を有する。 As explained above, the present invention is a hydraulic tool in which the ram 1 holding the compression die D is moved by hydraulic pressure in the main body 4, in which the ram 1 is provided with a large pressure receiving surface 2a and a small pressure receiving surface 3a, and A large capacity oil chamber 5 that pushes out the large pressure receiving surface 2a and a small capacity oil chamber 6 that pushes out the small pressure receiving surface 3a are provided in the main body 4, and the large capacity oil chamber 5 and the small capacity oil chamber 6 are connected to the hydraulic pump 1, respectively.
0, and a relief valve 8 is interposed in the large capacity oil chamber 5 that opens when the pump oil pressure increases above a certain level, and between the large capacity oil chamber 5 and the small capacity oil chamber 6,
Since the structure includes communication holes 7 and 7' that open when the small pressure receiving surface 3a is pushed out a predetermined distance, rapid forwarding is possible and the work can proceed quickly, and the oil does not pass through the relief valve 8 during compression. , communication hole 7,
By bypassing the oil to the oil chamber 7' and sending it to the large-capacity oil chamber 5, the relief pressure of the relief valve 8 is unnecessary, and the operating force of the pump 10 is reduced, making the work easier.
第１図は本考案の一実施例の早送り状態を示す
断面図、第２図は同圧縮初期の状態を示す断面
図、第３図は同連通孔開通後の状態を示す断面
図、第４図は他の実施例の断面図である。
１……ラム、２……大径部、２ａ……大受圧
面、３……小径部、３ａ……小受圧面、４……本
体、５……大径ラムシリンダ（大容量油室）、６
……小径ラムシリンダ（小容量油室）、７，７′…
…連通孔、８……リリーフ弁、１０……ポンプ、
Ｄ……圧縮ダイス。
Fig. 1 is a cross-sectional view showing an embodiment of the present invention in a fast forward state, Fig. 2 is a cross-sectional view showing the initial compression state, Fig. 3 is a cross-sectional view showing the state after the communicating hole is opened, and Fig. 4 The figure is a sectional view of another embodiment. 1... Ram, 2... Large diameter part, 2a... Large pressure receiving surface, 3... Small diameter part, 3a... Small pressure receiving surface, 4... Main body, 5... Large diameter ram cylinder (large capacity oil chamber) ,6
...Small diameter ram cylinder (small capacity oil chamber), 7,7'...
...Communication hole, 8...Relief valve, 10...Pump,
D... Compression die.
Claims (1)
り移動させる油圧圧縮工具において、前記ラム
に、大受圧面と小受圧面とを設けると共に、本体
内に大受圧面を押し出す大容量油室と、小受圧面
を押し出す小容量油室とを設け、大容量油室およ
び小容量油室を夫々油圧ポンプに連通し、かつ大
容量油室と油圧ポンプとの間にはポンプ油圧が一
定以上に高まると開くリリーフ弁を介在させ、ま
た大容量油室と小容量油室との間に、小受圧面が
所定距離押出されたとき開通する連通孔を設けた
ことを特徴とする油圧圧縮工具。 In a hydraulic compression tool in which a ram holding a compression die is moved by hydraulic pressure within the main body, the ram is provided with a large pressure receiving surface and a small pressure receiving surface, and a large capacity oil chamber for pushing the large pressure receiving surface into the main body, and a small pressure receiving surface. A small-capacity oil chamber that pushes out the pressure receiving surface is provided, the large-capacity oil chamber and the small-capacity oil chamber are connected to a hydraulic pump, and there is a space between the large-capacity oil chamber and the hydraulic pump when the pump oil pressure increases above a certain level. A hydraulic compression tool characterized by interposing a relief valve that opens and providing a communication hole between a large capacity oil chamber and a small capacity oil chamber that opens when a small pressure receiving surface is pushed out a predetermined distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11715783U JPS6029066U (en) | 1983-07-29 | 1983-07-29 | hydraulic compression tools |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11715783U JPS6029066U (en) | 1983-07-29 | 1983-07-29 | hydraulic compression tools |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6029066U JPS6029066U (en) | 1985-02-27 |
| JPS6317663Y2 true JPS6317663Y2 (en) | 1988-05-18 |
Family
ID=30269802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11715783U Granted JPS6029066U (en) | 1983-07-29 | 1983-07-29 | hydraulic compression tools |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6029066U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0524459Y2 (en) * | 1987-02-13 | 1993-06-22 | ||
| JP2598068Y2 (en) * | 1992-12-10 | 1999-07-26 | 株式会社泉精器製作所 | Piston rapid feed mechanism for manual hydraulic tools |
-
1983
- 1983-07-29 JP JP11715783U patent/JPS6029066U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6029066U (en) | 1985-02-27 |
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