JPH0329039Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a fall prevention device for a movable slide in a press machine, an injection molding machine, etc., which is equipped with a movable slide whose vertical stroke can be changed.

(Prior art) Fig. 8 shows a hydraulic press machine 1' according to a conventional example.
It includes a fixed main body 2' and a movable slide 3'. The fixed main body 2' includes a bed 6', a crown 7', a tie rod 8', etc., and the movable slide 3' is vertically movable by a hydraulic cylinder 9'. The product is then compression molded between molds 4' and 5' attached to the lower surface of the movable slide 3' and the upper surface of the bed 6'. 4
0' is a cylinder for preventing the movable slide from falling;
Attached to the crown 7', its telescopic rod 4
1' is removably inserted into the movable slide at the uppermost stroke position, and the movable slide 3'
This prevents the objects from falling and ensures safety when operations are stopped.

In the hydraulic press machine 1', molds 4' of various sizes,
5' is detachable from and replaceable with respect to the movable slide 3' and the bed 6'. In this case, the vertical stroke of the movable slide 3' can be changed according to the size of the molds 4', 5' in order to shorten the cycle time.

(Problem to be solved by the invention) If the vertical stroke of the movable slide 3' is made smaller than the maximum possible stroke width in response to a small mold, the top dead center of the movable slide during operation will be prevented from falling. Telescopic rod 4 of cylinder 40'
1' is lower than the position at which it can be inserted into the movable slide 3'. Then, in order to prevent the movable slide 3' from falling when the operation is stopped, the stroke of the movable slide 3' must be changed so that the movable slide 3' can reach the uppermost stroke position. However, it is troublesome to change the stroke every time the operation is stopped.

The present invention aims to solve the above problems.

(Means for Solving the Problems) The technical measures taken by the present invention to solve the problems of the prior art are characterized by the fact that the vertically movable slide 3 on the fixed main body 2 changes its vertical stroke. A latching member 11 is provided on one of the fixed main body 2 and the movable slide 3, and a fall regulating member 10 is provided on the other, and a plurality of latching members 18 are provided on the fall regulating member 10 at intervals vertically. is provided, and the fall regulating member 10 is attached via this latched portion 18.
The hook member 11 is removably engaged with the movable slide 3 to prevent it from falling,
The locking member 11 includes a holding plate 20 provided on the lower surface of the crown 7 of the fixed body 2, a pair of swing arms 21, and an arm opening/closing device 22, and the holding plate 20 is attached to the lower surface of the crown 7 via a spacer 23. A through hole 25 is formed in the holding plate 20 with a gap between the crown 7 and the holding plate 20, and the swinging arm 21 is fixed in the gap between the crown 7 and the holding plate 20. It can be opened and closed by swinging on a horizontal surface, and when closed, the latched portion 1
The arm opening/closing device 22 is provided with a coil spring 29 that is engaged with the arm 8 and disengaged when the arm is opened, and that biases each of the swing arms 21 in the closing direction. A telescopic cylinder 32 is provided, and an arm expanding portion 35 is provided at the upper end of a rod 33 fitted to the cylinder 32. When the arm expanding portion 35 is pushed up, the arm 21 is expanded to expand the swinging arm 21. Each has a point at which an inclined surface 36 is formed.

(Function) The latching member 1 is attached to the latching portion 18 of the fall regulating member 10.
By engaging 1, the fall of the movable slide 3 is regulated. Since a plurality of the latching parts 18 are provided on the fall regulating member 10 at vertical intervals, the latching members 11 are attached to the fall regulating member 10 at the top and bottom where the latching parts 18 are provided. Engagement can occur in multiple positions. As a result, even if the stroke of the movable slide 3 is changed in accordance with the size of the mold, the latching member 11 can be attached to the latching member 11 via the latched portion 18 at different upper and lower positions of the movable slide 3.
is engaged with the fall regulating member 10, and the movable slide 3
It is possible to control the fall of.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

FIGS. 1 to 7 show a hydraulic press 1 to which the present invention is applied, which is a well-known type having a fixed main body 2 and a movable slide 3, and which compresses thermosetting resin between upper and lower molds 4 and 5. This is done in

In the stationary body 2, 6 is a bed, 7 is a crown, and 8 is a tie rod. Lower molds 5 of various sizes are attached to the bed 6 in a detachable and replaceable manner. Reference numeral 9 denotes a hydraulic cylinder, which is installed on the crown 7, and has a movable slide 3 on its vertically telescoping rod.
are concatenated. Upper molds 4 of various sizes are detachably attached to the lower surface of the movable slide 3. The vertical stroke of the movable slide 3 can be changed depending on the size of the molds 4 and 5, thereby reducing cycle time.

A fall regulating member 10 is provided on the upper surface of the movable slide 3, and a locking member 11 is provided on the crown 7 to detachably engage with the falling regulating member 10. In this embodiment, the fall regulating member 10 and the locking member 1
1 are provided at two opposing positions sandwiching the press center C, as shown in the fifth figure.

The fall regulating member 10 has a vertically elongated rod shape, and its lower end is inserted into a mounting hole 12 formed on the upper surface of the movable slide 3 as shown in FIG. Half flange 14, 14
is fitted, and the flanges 14, 14 are fixed to the movable slide 3 with bolts 15, thereby being fixed to the movable slide 3 in an upwardly projecting manner. A plurality of circumferential grooves 16 are formed at equal intervals vertically in the middle of the fall regulating member 10. Each circumferential groove 16 is formed by a bottom surface 17 and upper and lower opposing surfaces 18 and 19,
The upper side facing surface 18 is used as a hooked portion. Further, the lower opposing surface 19 is a surface that gradually slopes radially inward from the outer circumferential surface 10a of the fall regulating member 10 toward the circumferential groove bottom surface 17.

The hanging member 11 is attached to the lower surface of the crown 7 as shown in FIGS. 2 to 4, and includes a holding plate 20, a pair of swinging arms 21, 21, and an arm opening/closing device 22.

The holding plate 20 is attached to the lower surface of the crown with spacers 23 and bolts 24 at intervals. A through hole 25 for the fall regulating member 10 is formed in this holding plate 20, and the through hole 25 is further formed in the holding plate 20.
5, a guiding cylinder 26 extends downward through which the fall regulating member 10 is inserted.

The swinging arms 21, 21 are arranged in the gap between the crown 7 and the holding plate 20, and each rear end is pivotally supported by a support pin 27 erected from the holding plate 20, so that the swinging arms 21, 21 can swing freely around the vertical axis. There is. From the rear end of each swing arm 21, 21 is a spring support shaft 28, 28.
A pair of spring support shafts 28, 28 are also provided laterally outward of the spring support shafts 28, 28 to project rearward from the holding plate 20, and the arm side spring support shafts 2
8 and 28 respectively and the plate side spring support shafts 28 and 2
The pair of swinging arms 21, 21 are biased to swing in the direction in which the front end sides are closed by tensioning coil springs 29, 29 on each of the swinging arms 21, 21. Also,
Semicircular notches 30, 30 are formed in the opposing portions of both swing arms 21, 21, and the fall regulating member 10 is positioned between the opposing notches 30, 30.

The arm opening/closing device 22 includes a hydraulic cylinder 32 attached to the lower surface of the holding plate 20 via a bracket 31. This hydraulic cylinder 32 has a vertically telescopic rod 33 that projects vertically from the cylinder body and is driven vertically, and a compression coil spring 34 is wound around the downwardly projecting side of the rod 33 so as to bias the rod 33 downward. has been done. In addition, the upper end of the rod 33 is tapered so that the arm expansion portion 3
It is said to be 5. That is, the rod 33 and both swinging arms 21, 21 are positioned so as to correspond vertically, and both swinging arms 21, 21 at the corresponding positions
The opposing surfaces are inclined surfaces 36, 36 so that the front end sides of the swing arms 21, 21 can be expanded by being pushed up by the expanding portion 35, as shown in FIG.

Further, limit levers 37, 37 project forward from the front ends of the respective arms 21, 21, and a pair of limit switches 38, 38 are attached to the holding plate 20. Each limit switch 38,3
The 8 switch pieces 38a, 38a are connected to the respective limit levers 37, 38a associated with the swing arms 21, 21, respectively.
The limit levers 37 are located outside of each limit lever 37, 37 so as to be brought into contact with each other and turned on by the respective expansion swings. Then, the movable slide 3 can be driven up and down only when both limit switches 38, 38 are both turned ON due to the expansion of both swing arms 21, 21, and either one of the swing arms 21, 21 is in the closing direction. When it swings to OFF and turns OFF,
It is configured such that the movable slide 3 cannot be driven up and down.

According to the above configuration, when pressing the product between the molds 4 and 5 by driving the movable slide 3 up and down, the arm expansion portion 35 of the hydraulic cylinder 32 is moved to the third position.
By pushing up the inclined surfaces 36, 36 of both arms 21, 21 in the upper position as shown by the imaginary line in the figure, both swinging arms 21, 21 are expanded as shown by the imaginary line in FIG. The vertical movement of the regulating member 10 is not restricted. In order to prevent the movable slide 3 from falling when the operation is stopped, the arm expansion part 35 is placed in the lower position as shown by the solid line in FIG. Arms 21, 21 are connected to springs 29,
Due to the elastic force of 29, it is closed as shown by the solid line in FIG. 2, and the bottom surface 17 of the circumferential groove 16 of the fall regulating member 10 is held. This results in
The movable slide 3 is prevented from falling by engaging the latched portion 18, which is the upper facing surface of the circumferential groove 16, with both swing arms 21,21. At this time, since the limit switches 38, 38 are turned OFF, the movable slide 3 cannot be moved up or down either, which is considered to be highly safe. And movable slide 3
When changing the vertical stroke of the movable slide 3 in multiple stages corresponding to the sizes of the molds 4 and 5, by making the amount of stroke change correspond to the vertical spacing of the plurality of latched parts 18, the upper dead end of the movable slide 3 can be changed. Even if the point positions are different up and down, the latching member 1 is attached for each different top dead center position.
1 is engaged with the fall regulating member 10 via the hooked portion 18, thereby preventing the movable slide 3 from falling. (Here, the left half of FIG. 1 shows the highest limit position of the movable slide that can prevent falling, and the right half shows the lowest limit position.) In the above embodiment, the present invention is applied to a hydraulic press machine. However, the present invention is not limited thereto, and may be applied to, for example, an injection molding machine. Furthermore, the fall control of the movable slide 3 does not have to be performed at the top dead center position.

(Effects of the invention) According to the invention, the fall regulating member is provided with a plurality of latching parts spaced apart from each other vertically, and the latching member is attached to the fall regulating member via the latching parts on the movable slide. Since the movable slide is removably engaged to prevent the movable slide from falling, it is possible to prevent the movable slide from falling at different positions above and below. In particular, the latching member includes a pair of swinging arms disposed between the crown and a holding plate fixed to the lower surface of the crown with a gap, and the swinging arms are opened and closed on a horizontal plane to Since it engages and disengages from the latched portion of the regulating member, it can sufficiently withstand the load of the slide when it engages and disengages, and prevents deformation and breakage of the swinging arm. Since the arm swings on a horizontal plane, it can be made compact in the vertical direction.

Further, the swinging arm has an inclined surface, and the expanding portion provided on the cylinder is pushed up on this inclined surface to expand the arm, so that the expansion, that is, the detachment can be ensured.

Therefore, there is no need to change the stroke of the movable slide every time the movable slide is stopped.

[Brief explanation of the drawing]

1 to 7 relate to an embodiment of the present invention, in which FIG. 1 is a front view for explaining the schematic configuration of a hydraulic press machine, FIG. 2 is a plan cross-sectional view of essential parts of a fall regulating member and a latching member,
Fig. 3 is a side sectional view of the main part, Fig. 4 is a back sectional view of the main part, Fig. 5 is a plan view for explaining the schematic configuration, Fig. 6 is a sectional view of the main part of the hanging member, and Fig. 7. 8 is a cross-sectional view for explaining the attachment of a fall regulating member, and FIG. 8 is a schematic diagram for explaining the configuration of a press machine according to a conventional example. 2...Fixed side main body, 3...Movable slide, 10
...Fall regulation member, 11...Latching member, 18...
Latched part.

Claims (1)

[Claims for Utility Model Registration] A vertically movable slide 3 is provided on the fixed main body 2 so that its vertical stroke can be changed, and the fixed main body 2
A latching member 11 is provided on one side of the movable slide 3, and a fall regulating member 10 is provided on the other, and a plurality of latched portions 18 are provided on the fall regulating member 10 at intervals vertically. In the fall prevention device for a vertically movable slide, in which a hooking member 11 is removably engaged with a fall regulating member 10 via a stopper 18 so as to prevent the movable slide 3 from falling, the hooking member 11 is attached to a fixed body. 2 crown 7
The holding plate 20 is provided on the lower surface of the crown 7, and the holding plate 20 is fixed to the lower surface of the crown 7 with a gap through a spacer 23. A through hole 25 is formed through which the drop regulating member 10 is inserted, and the swinging arm 21 is disposed in the gap between the crown 7 and the holding plate 20 and swings on a horizontal plane to open and close. freely, and when closed, the latched portion 1
The arm opening/closing device 22 is provided with a coil spring 29 that is engaged with the arm 8 and disengaged when the arm is opened, and that biases each of the swing arms 21 in the closing direction. A telescopic cylinder 32 is provided, and an arm expanding portion 35 is provided at the upper end of a rod 33 fitted to the cylinder 32. When the arm expanding portion 35 is pushed up, the arm 21 is expanded to expand the swinging arm 21. A fall prevention device for vertically movable slides, characterized in that each has an inclined surface 36 formed thereon.