JPS61206600A - Desk press machine - Google Patents

Abstract

PURPOSE:To provide the safety of an operation by pressing efficiency a work when a ram is operated by the detaching force of a driving shaft cam to make primary descending and is pressurized by the secondary rescending means upon descending to the prescribed position and to make idle descending of the ram when foreign material is interposed. CONSTITUTION:An operating arm 16 and a sliding body 13 descend by overcoming the force of a spring 13g when a press contact wheel 17 of a cam 7 of a driving shaft 5 is pushed down. An engaging claw 36c of an operating part 36b moves by overcoming the energizing force of the spring when the working part is pressed by a press contact ring 35 of a cam 8. The work W is then pressed by the secondary descending means fitted to the press engaging part 23 of the ram 20. The claw 36c is detached when pressed by the press contact ring 36d of the cam 9. The ram 20 ascends together with the ascending of the arm 16 and the body 13. If there is the abnormal intervening material F, the descending ram 20 is idly stopped by a buffer engaging part 22, by which the engagement of the claw 36x with the part 23 is prohibited and the exertion of the pressing force is obviated. The pressing is thus efficiently and safely executed.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a table press machine, and particularly to a table press machine in which the ram stops descending if a finger or the like is caught in a press die at the lower end of the ram when the ram is descending. Pertains to.

[Conventional technology]

Conventionally, table-top presses for crimping electric wire terminals and other pressing processes lower a ram in a staggered manner using a cam attached to a motor drive shaft, and the ram is configured to descend straight when descending.

Therefore, it was common for people to accidentally get their hands or fingers caught between the lower die and the press die at the lower end of the ram, resulting in injury.To prevent this, two switches were installed, and the switch input was made after confirming safety. There are also known devices configured to do so.

[Problem that the invention seeks to solve]

Those that do not use the above-mentioned double switch system have difficulty in ensuring safety and are also prone to erroneous positioning. In addition, the double switch method requires changing the switch each time, which is not only complicated but also difficult to improve efficiency.

[Means for solving problems]

The present invention solves the above problems and provides a two-stage lowering system for the ram so that even if a finger is caught between the lower die and the press die at the lower end of the ram, the ram will immediately stop descending without causing injury to the fingers. This invention was invented for the purpose of providing a tabletop press machine that can be used as a tabletop press machine.Specific means include a primary lowering means that lowers the ram a predetermined distance by cam operation on the drive shaft, and a primary lowering means that lowers the ram a predetermined distance only when the ram has lowered to a predetermined position. and a secondary lowering means for pressurizing and lowering the pressure, - the large lowering means has an engaging body that comes into loose contact with the ram, and when an external locking force is applied to the ram, the engaging body separates from the engaging portion of the ram. The tabletop press machine is characterized in that only the primary lowering means is lowered into the gap, and the secondary lowering means is configured to lower the gap without engaging with the ram.

[Effect]

According to the present invention having the above configuration, a primary lowering means and a secondary lowering means are provided for lowering the ram, and the large lowering means has an engaging body loosely connected to the engaging portion of the ram, When the lowering means lowers due to the operation of the cam, the ram also lowers accordingly, and when the ram lowers a predetermined interval, the engaging part of the secondary lowering means engages with the engaging part of the ram, and the secondary lowering occurs. Means pressurizes the ram.

On the other hand, while the ram is being raised by a predetermined distance by the primary lowering means, for example, a finger or the like may get caught between the lower die and the press die at the lower end of the ram, preventing the ram from descending, and this causes a locking force to be applied to the ram. If this is applied, the engaging body of the large lowering means will be disengaged from the engaging portion of the ram, and only the primary lowering means will be lowered into the gap while the ram remains stationary. As a result, even if the camshaft rotates, the secondary lowering means does not engage its engaging portion with the ram engaging portion and falls down into the gap, so the fingers, etc. remain clamped by the press mold. However, safety is guaranteed without being pressurized.

That is, the secondary lowering means has a pressurizing main press action, but is configured so that it does not engage with the ram unless the ram has lowered by a predetermined interval, and the large lowering means has a weak locking force. This function has the effect of lowering the ram to a predetermined position where it engages with the secondary lowering means, but if another locking force is applied to the ram before the ram has descended by a predetermined distance, the ram will not be involved. Only the primary lowering means falls into the gap, and as a result, the retaining part of the ram does not come down to the waiting position of the engaging body of the secondary lowering means, so it cannot be engaged, and the secondary lowering means also falls into the gap. It is something to be given down.

(Example) Embodiments of the present invention will be described based on the drawings.

FIG. 1 is a perspective view of a bench press.

A support 3 is erected on the base 2 of the tabletop brace ml, and the support 3
A case body 4 is attached so that the height can be freely adjusted. A drive shaft 5 is horizontally supported inside the case body 4, and a motor 6 is connected to the outside of the case body of the drive shaft 5, and a cam 7 for blowing down and a cam 7 for secondary descent inside the case body. A cam 8 and a cam 9 for releasing the engaging body are arranged side by side.

Further, on one side of the case body 4 parallel to the drive shaft 5, a large lowering means 10, a ram 20, and a secondary lowering means 30 are arranged in order from the outside.

The ram 20 is shaped like a rod that is flat in the front and back when viewed from the front (left side in FIG. 2), and is integrally formed with a press mold 21 attached to the lower end. The pressurizing engaging portion 2 that loosely engages with the engaging body of the lowering means is carved in the shape of a triangular groove with the length of the structure. Thus, the ram 20 is loosely fitted in the ram fitting part 4a of the case body 4 in a vertically movable manner, and a spring is compressed between the upper part of the case body 4 and a spring hook part (not shown) on the side of the ram 20. The structure is such that the ram 20 is maintained raised normally.

First, two guides 12.12' are arranged in parallel orthogonally between the upper and lower frames 11.11' with an appropriate interval between them, and the sliding body 13 is fitted onto the guides 12.12' so as to be able to slide vertically. It is. The sliding body 13 is a rectangular flat cube when viewed from the front (FIG. 3), and has a storage hole 13a in the center of the back surface, and a locking body 14 is inserted into the storage hole 13a with a shaft 13c.
The locking body 14 is pivoted to be movable back and forth through the spring 13d, and is elastically biased to press the toe portion of the locking body 14 in the ram direction so that the toe portion protrudes from the rear cover 13b. In addition, guide holes 13e, 13 passing vertically through both end edges of the upper surface.
e is provided through the guide hole 13e, and the guide 12 is fitted into the guide hole 13e and slid up and down.

Further, a spring body 13f is attached to the lower surface, and the spring body 13f is attached to the bottom surface.
A spring 13g is hung between f and the upper frame body 11 to maintain the sliding body 13 close to the upper frame body 11 at all times.

Furthermore, a pull-down arm 15 is pivotally attached to the side surface of the sliding body 13, and an operating arm 16 is pivoted to the tip of the pull-down arm 15. The operating arm 16 has its base end connected to the case body 4.
The shaft is attached to the inside of the case 4, with the tip protruding outside the case 4, and the shaft 16
The distal end portion is configured to be movable up and down about point a, and a press ring 17 is rotatably supported on a shaft 16b that projects horizontally from the longitudinal middle portion of the actuating arm 16.

Therefore, the pressure contact ring 17 has the sliding body 13 connected to the upper frame body 1.
1, and when the distal end of the actuating arm 16 is in an upward state, it comes into contact with the notch 7a of the blow-down cam 7, and the blow-down cam 7 As the slider 13 rotates, the actuating arm 16 is pushed down while contacting the cam 7, and the amount of pushing down is determined by the period during which the sliding body 13 gently lowers the ram 20 with its engaging body 4, that is, the back surface of the ram 20, which will be described later. It is configured to be equal to a predetermined interval at which the side engaging portion 23 descends to the position of the engaging claw 36c of the engaging body 36 of the secondary lowering means 30. As a result, as shown in the side view in FIG. 2, under normal conditions, both the ram 20 and the sliding body 13 are maintained in the upper fixed position, and the lower mold 24 is placed directly below the ram 20 on the base 2. It is arranged.

The secondary lowering means 30 is constructed as follows.

As shown in FIG. 5, the front side of the secondary lowering means 30 has substantially U-shaped upper and lower base bodies 31 and 32, with openings arranged opposite each other, and an upper link 33 pivoted to the opening of the upper base 31. The upper link 33 is formed into a bifurcated shape, and the two lower links 34 and 34 are normally pivoted between the branch rods 33a and 33b with a pressure ring 35 sandwiched between the two links. be. It is pivoted to the lower base body 32 in such a manner that the lower ends of the rain links 34 and 34 are disposed on both sides with the engaging body 36 inside the opening.

The engaging body 36 is formed into an abbreviated shape with a base end 36a and an actuating part 36b, and its fulcrum is pivoted to the lower base 32 so that the base end 36a is in a substantially vertical position and the actuating part 36b is in a substantially vertical position. is arranged substantially horizontally, and an engaging pawl 36C is provided protruding from the upper front edge of the base end 36a, and a pressure contact ring 36d is pivotally supported at the tip edge of the operating portion 36b. Further, a spring 36e is attached to the lower part of the operating portion 36b.

As shown in FIGS. 2 and 7, the secondary lowering means 30 having the above configuration is located at the front part of the case body 4 and the rear part of the ram 20, and is fitted into a guide part 4b provided on the case body 4. The engaging claw 36c of the engaging body 36 is brought into contact with the back surface of the ram 20, the actuating portion 36b is extended in the direction of the drive shaft 5, and the spring 36f is hung between the spring 36e and the case body 4. The engaging claw 36c is configured to be in pressure contact with the ram 20 at all times. The lower base body 32 is made vertically slidable along the guide portion 4b, and a spring 30a is interposed between the lower end portion and the case body 4 to maintain the height of the engaging claw 36c at a predetermined position. The upper base body 31 is configured to be able to descend against the spring 30a when pressure is applied from above, and the upper base body 31 is maintained in a vertically slidable manner along the guide portion 4b, and a case is provided at the upper end thereof. The height can be adjusted by a height adjuster 4c attached to the body 4.

In the above configuration, the height of the lower base body 32 is specified, and therefore the height of the engaging body 36 that is pivotally supported by the lower base body 32 is also specified, so the pressure contact ring 36d approaches the engaging body detachment cam 9, When the actuating portion 9a of the cam 9 comes into contact with the cam 9, the actuating portion 9a descends, and the tip of the actuating portion 36b is lowered in conjunction with the actuating portion 9a, thereby moving the engaging claw 36'C to the ram 2.
It is configured to make the IA theory start from 0.

In a normal state, the upper link 33 and the lower link 34 are bent in a substantially 〈 shape on the side, and the pressure contact ring 35 is protruded toward the secondary lowering cam 8 direction.

In the drawings, reference numeral 6a indicates a drive motor switch, 6b an electrical component, 6C a power switch, and W a workpiece.

In the above configuration, as shown in FIG. 1, when the power switch 6C is turned on, the workpiece W is set in position on the lower die 24, and the foot-operated switch 6a is turned on, the drive is activated as shown in FIG. As the shaft 5 rotates, the primary lowering cam 7 presses down the pressure welding ring 17, and in conjunction with this, the actuating arm 16 moves the shaft 1.
Centering around 6a, the tip part and the pull-down arm 1 connected thereto.
Lower 5.

In conjunction with the lowering of the pull-down arm 15, the sliding woodwork 3 lowers the ram 20 with its engaging body 14 loosely engaged with the engaging portion 22 of the ram 20. When the ram 20 is lowered by a predetermined interval, the engaging claw 36c of the engaging body 36 of the secondary lowering means 30 is fitted into the pressurizing engaging portion 23 by the elastic force of the spring 36f, and at this time the press mold 21 is moved along the imaginary line. It will temporarily lower to the position 21' shown in . At this point, the press mold 21 is not in contact with the workpiece W.

Subsequently, as the drive shaft 5 rotates, the actuating portion 8a of the secondary lowering cam 8 comes into contact with the pressure shaft 35 and presses it in the direction of the ram 20, and the pressing force causes the upper and lower links 33. 34 is extended, the lower base body 32 and the engaging body 36 connected thereto are lowered, and the engaging claw 36c of the engaging body 36 is lowered.
is fitted into the engaging portion 23 of the ram 20, so the ram 2
The press die 21, 21' presses the workpiece W against the lower die 24. Further, as the drive shaft 5 rotates, the engagement member disengagement cam 9 lowers the pressure contact shaft 36d of the engagement member 36 with its operating portion 9a, and the engagement pawl 36G disengages from the engagement portion 23 of the ram 20 due to the balance action. , the ram 20 is the sliding body 13
At the same time, the sliding body 13 is raised to its original position by the elasticity of the spring 13g.

After that, repeat this process, and install the NC in the electrical component 6b.
NC control can be performed by distributing power.

Therefore, during operation of the press machine, the press mold 21 and the lower mold 24
If the finger F is caught between the
The engaging claw 36c of the engaging body 36 of the secondary lowering means 30 is not yet fitted into the pressurizing engaging portion 23 of the ram 20. Then, when the drive shaft 5 further rotates and the primary lowering cam 7 pushes down the operating arm 16, the sliding body 13
tries to pull down the ram 20, but the ram 20
As a result, the engaging portion 22 of the ram 20
The engaging body 14 of the sliding body 13 that is in loose contact with the actuating arm 1
6, the sliding body 13 separates from the loose engagement portion 22, and the sliding body 13 drops down without the ram 20. Subsequently, even if the secondary lowering cam 8 presses the pressure shaft 35 to lower the lower base body 32, the engaging body 36 is in a state in which the engaging claw 36c is not fitted into the pressing engaging portion 23 of the ram 20. Since the robot descends in the air, no strong pressure is applied to the fingers F, so there is no chance of injury.

The height of the case body 4 is changed depending on the lower die 24, the workpiece W, etc., and is fixed by tightening the fixing screws 4e. Ram 2
The secondary lowering interval of 0 is achieved by adjusting the height of the upper base 31 up and down using the adjustment tool 4C on the upper part of the upper base 31, but the ram lowering operation range of the secondary lowering means is set to a maximum of 5 degrees, and from 0 to 0. Adjust the height within the range of 5 dragons.

Note that the present invention is not limited to the above configuration, and the design may be changed as appropriate.

〔effect〕

As described above, the present invention includes a primary lowering means that lowers the ram with a gentle locking force, and a secondary lowering means that cannot maintain pressurization unless the ram is lowered to a predetermined position by the blowing lowering means. (a) Even if your fingers get caught between the press die and the lower die,
The lowering of the ram stops, and the blow-down means operates idly, and the ram does not descend to the predetermined position.The secondary lowering means also cannot lower the ram under pressure and operates idly, resulting in injuries to hands, fingers, etc. There is no risk of injury (it has the effect of allowing safe operation).

(b) Also, if a large obstacle other than a specific workpiece gets caught, the press die may be damaged, but in the present invention, the ram stops descending in the same way as if a finger was caught, so The mold! ! There is no risk of injury.

(c) There is no need to operate a double switch, and input is only made using a foot switch, which has the effect of improving efficiency and reducing production costs.

[Brief explanation of drawings]

The drawings relate to the present invention, and FIG. 1 is a perspective view of a table press machine;
Figure 2 is a side view, Figure 3 is a front view of the main part of the primary descent means,
Figure 4 is a cross-sectional view of the sliding body A-A in Figure 3, Figure 5 is a front view of main parts of the secondary lowering means, Figure 6 is a perspective view of the engaging body of the secondary lowering means, and Figure 7 is a tabletop press. FIG. 8 is a side view of the desk press machine showing a state in which the fingers are held between the press molds. 1... Tabletop press machine 2... Base 3... Support
4...Case body 4a...Opening part
4b...Guide part 4c...Height adjuster 4d
... Ram fitting part 4e ... Fixing screw 5 ...
Drive shaft 6...Motor 6a...Switch 6
b...Electrical section 6c...Power switch 7.
...-Blowdown cam 8...Secondary descent cam 9...
Engagement body weaning cam 10... - blowing down means 11, 11'
...Upper and lower frame body 12.12'...Guide 13...
Sliding body 13a... Storage hole 13b... Back cover 13c... Shaft 13d... Spring
13e... Guide hole 13f... Spring identity 13
g... Spring 14... Locking body 15.
... Pulling arm 16 ... Actuation arm 16a, 1
6b...Shaft 17...Pressure shaft 20...Ram 21...Press mold 22...Engagement part (loose connection) 23...Engagement part (pressure) 24...Lower mold 30...
Secondary lowering means 31... Upper base 32... Lower base
33...Top links 33a, 33b...
Branch rod 34...lower link 35...pressure shaft
36... Engaging body 36a... Base end portion 36
b... Actuation part 36c... Engagement claw 36d...
- Pressure shaft 36e...Spring 36f...Spring F...Finger W...Work Patent applicant Ebina Kikai Co., Ltd. Fig. 2 Fig. 5 Fig. 3 O8 @

Claims (1)

[Claims] It has a primary lowering means that lowers the ram a predetermined distance by cam operation of the drive shaft, and a secondary lowering means that pressurizes and lowers the ram only when the ram is lowered to a predetermined position. When an external locking force is applied to the ram with engagement, the engaging body separates from the engaging part of the ram, and only the primary lowering means drops, and the secondary lowering means does not engage with the ram. A tabletop press machine characterized by being configured to descend in the air.