JPH0124413Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is applicable to the rotation of multi-shelf carts used for cargo handling operations such as moving processed products from a certain place to a predetermined place in a factory, for example. When you have finished unloading the processed products stored in the trays placed on the shelf frame, lift the rotary shelf frame upward from the front and lift it so that it does not get in the way of unloading the next lower tray. This relates to a slider type lock stay for firmly holding a rotating shelf frame in a retracted position or an inclined position.

(Prior art) As shown in Fig. 11, a multi-shelf car has four main columns c erected at the corner portions of a base plate b to which casters a are attached at the four corners, and four main columns c are installed at the center of both sides of the base plate. An intermediate support d is erected at the center, and the two main supports c
A gate-shaped fixed shelf frame f ₁ (hereinafter simply referred to as fixed shelf frame) with one end e fixed to the lower part of the intermediate support and whose front side is open is attached to the lower part of the fixed shelf frame. A rotating shelf frame f ₂ is rotatably attached to both main supports c on the back side at a distance (l ₁ > l ₂ ) above, and these fixed and rotating shelf frames are combined as one set. , these plural sets are attached to the main support column c on the back side.

In addition, the top rotating shelf frame _f2 has a canopy g.
is affixed to the rotating shelf frame for the second and subsequent tiers.
Trays t for storing processed products are installed in f ₂ , and support members h such as pipes are installed at both front ends of each of these rotary shelf frames f ₂ .
is installed, and when the lowest rotary shelf frame _f2 reaches the lowered position (closed position) from the raised position (open position), the lower end of the support member h comes into contact with the base plate b,
Next, the lower end is placed on the upper end of the support member h one after another, and only the uppermost fixed shelf frame f ₁ has both gate-shaped leg ends i fixed to the main support c on the near side. has been done.

(Problem to be solved by the invention) However, the cam type lock stay having the above structure is unstable because the lock state is brought about by the sliding roller, the cam surface of the double-arm lever, and the tensioning force of the coil spring. The lock is easily dislodged due to impact or rough operation of the rotating shelf frame, and due to the structure, the double-arm lever and coil spring protrude outwards, making it impossible to organize it compactly. There is a drawback that the lock may come off if the operator touches the dual-arm lever or the coil spring.

The purpose of this invention is to lift the rotary shelf frame from the front upwards after unloading work is completed so as not to interfere with the unloading of the next lower tray, and to firmly maintain that state or position. The goal is to provide a rock stay.

(Means for Solving the Problem) Therefore, according to the present invention, a linear sliding guide groove provided approximately at the center of the band-shaped lock body having a channel-shaped cross section has a groove located above with the same width as the linear sliding guide groove. A hollow box-shaped slider in which a curved guide groove is continuously formed, and a locking recess and a rectangular notch are formed at one end of the belt-shaped lock body, the shape of which corresponds to the shape of the closed end of the curved guide groove. The member is fitted so as to be reciprocally movable, and a fixed side mounting bracket fixed to the fixed shelf frame is attached to the other end, and an axis between the mounting plate of the slider member and the mounting plate fixed to the belt-shaped lock body is attached. A stepped roller consisting of a large roller and a small roller provided on the movable side mounting bracket fixed to the rotating shelf frame by winding a coil spring on the line is connected to the sliding guide groove, the curved guide groove and the locking recess. At the same time, a reset lever is elastically provided on the band-shaped lock body, and the entire body is covered with a cover, so that when the stepped roller moves in the locking direction, the large roller moves into the locking direction. When the small roller comes into contact with the connecting portion of the curved guide groove and the sliding guide groove at the same time as it comes into contact with the locking recess, it becomes locked, and when the stepped roller moves upward and reaches the unlocked position, the small roller becomes locked. When the rear end of the lever comes into contact with the end surface of the slider member, it acts as a stopper, and when the stepped roller moves in the opposite direction, the tip of the lever is pushed up, the stopper action is released, and the lever is in a reset state. It is.

(Example) Next, the present invention will be explained in more detail with reference to an example shown in FIGS. 2 to 10.

In FIGS. 2 and 3, 11 is a band-shaped lock body with a channel-shaped cross section, 12 is a hollow box-shaped slider member that fits inside the band-shaped lock body and slides in the longitudinal direction; 13, The fixed side mounting bracket 14 is attached to the fixed shelf frame f ₁ made of plastic pipe, for example, of a multi-shelf car as shown in FIGS. 11 and 12, and 14 is attached to the same rotating shelf frame f ₂ as before. 15 is a reset lever, and 16 is a cover. A linear sliding guide groove 17 is provided approximately in the center of the belt-shaped lock body 11 in the longitudinal direction. Above (or below) for illustrations of the same width
A curved guide groove 18 located at the slider member 12 is formed continuously with the sliding guide groove, and the slider member 12 has a band-like shape as described above when the lock is locked and when the lock is released, as shown in FIGS. 4 and 5. It reciprocates within the lock main body 11 at the same level, and as shown in FIG. A rectangular notch 21 having a locking recess 20 having the same shape and sign is formed. Further, the reset lever lever 15, which is mainly used to return the lock from the open state to the initial state and to maintain the lock in the open state, has an outer shape approximately like that of a spoon, as shown in FIGS. 6 and 7. It is pivotably mounted on the flat surface of the band-shaped lock body 11 with a pin 23 via a mounting lug 22 which is formed in a shape and protrudes at right angles from the center thereof, and the tip 24
is elastically loaded by a pre-compressed coil spring 25 attached to one side wall of the band-shaped lock body, and the rear end 26 comes into contact with the inner wall or flat surface 27 of the slider member 12 when the lock is locked. When opened, it comes into contact with the end surface 28 of the slider member and acts as a stopper to prevent it from falling.

Furthermore, in FIG. 9, there is a reset lever lever 15 on the opposite side of the flat surface of the belt-shaped lock body 11.
The mounting plate 29 is fixed so as to cover the
On the back side of the mounting plate 30 opposite to the flat surface of the slider member 12, tongue pieces 31 and 32 are formed, respectively, and a coil spring 33 is wound between these tongue pieces. The spring naturally expands when locked and contracts when unlocked. In addition, as shown in FIGS. 4 and 5, a stepped roller 36 and a small roller 37 are rotatably attached to a pin 35 implanted in a convex pedestal 34 of the movable mounting bracket 14. roller 38
The sliding guide groove 17 and the curved guide groove 18 of the belt-shaped lock body 11 and the locking recess 2 of the slider member 12
In this case, the large roller reciprocates so as to cover the upper surfaces of the sliding guide groove and the curved guide groove, and at the same time also moves forward in the locking recess. Similarly, the small rollers fit and slide, and the small roller simultaneously moves within the sliding guide groove and the curved guide groove with a margin, and the first
The cover 16 shown in FIG. 0 covers the open part of the belt-shaped lock body 11, and is attached to the side of the body with a plurality of screws 39 as appropriate, thereby stopping both ends of the coil spring 33. It is possible to prevent the attached mounting plates 29 and 30 from floating up, and to prevent dust from entering the inside of the stay. In addition, a cover 16 is provided on the belt-shaped lock body 11.
are attached with screws 39, unless a channel-shaped notch 19 (see FIGS. 4 and 8) is formed in the slider member 12, as shown in FIGS. The end portion comes into contact with the outer wall of the slider member and cannot reciprocate.

(Function) To describe the operating mode of the lock stay according to the present invention having the above configuration, as described above, the fixed side mounting bracket 13 is attached to the fixed shelf frame f ₁ as shown in FIGS. 11 and 12. The fixed and movable side mounting bracket 14 is fixed to a rotating shelf frame f ₂ that is rotatably attached to the support column b on the back side, and is stored in a tray t on the rotating shelf frame. After unloading the processed products, the next lower tray t
By lifting the rotary shelf frame toward you (in the direction of the arrow) so that it does not get in the way when unloading the cargo, it will fit into the sliding guide groove 17 of the belt-shaped lock body 11, as shown in FIG. The stepped roller 38 of the movable side mounting bracket that is fitted moves upward in the direction of the arrow, and then moves up into the locking recess 2 of the slider member 12.
0 is located above the sliding guide groove, the large roller 36 of the stepped roller comes into contact with the corner 40 of the locking recess, and subsequently pulls the coil spring 33 while pulling the locking recess. At the same time as entering the stop recess, the small roller 37 comes into contact with the inside of the curved guide groove 18 communicating with the sliding guide groove and is forcibly pulled. Next, when the small roller 37 is pushed into the curved guide groove 18, the slider member 12, which had been pulling the coil spring 33 by the rotation of the rotary shelf frame _f2 , is moved by the restoring force of the coil spring. In order to be pulled back at , the small rollers are brought into contact with and restrained by the connecting portions 41 of the curved guide groove and the sliding guide groove, respectively, and the small rollers are completely locked, so that the rotating shelf frame f ₂ is firmly held at any predetermined tilted position and becomes locked.

Next, in order to release or reset from the locked state, the rotary shelf frame _f2 is lifted further upward from the predetermined inclined position, and as shown in FIGS. 6 and 7, the stepped roller Reference numeral 38 indicates that the slider member 12 is moved in the direction of the arrow by pulling the coil spring 33, and at the same time, the rear end 26 of the reset lever lever 15, which had been elastically loaded by the coil spring 25, is in the state shown in FIG. 6, that is, the slider member collides with the end surface 28 of the slider member and acts as a stopper, so that the slider member does not move but remains at that position.On the other hand, in this stopped state, At this time, the curved guide groove 18 of the band-shaped lock body 11 and the locking recess 20 of the slider member coincide and the locked state is released, so that the rotating shelf frame f ₂
When pressed down, the stepped roller 38, together with the restoring force of the coil spring 33, passes through the sliding guide groove 17 connected to the curved guide groove, and pushes the tip 24 of the lever lever 15 against the coil spring 25. By rotating the lever in the direction, the rear end 26 of the lever lever and the end surface 28 of the slider member are released from abutting each other, resulting in a reset state.

(Effects of the invention) As described above, according to the present invention, the following effects can be achieved.

(1) The coil spring installed between the mounting plate of the band-shaped lock body and the mounting plate of the slider member is located almost on the axis of the band-shaped lock body, so the locking condition is stable, and therefore it is protected against impact and rotation. Since the lock will not be dislodged due to rough operation of the shelf frame, the retracted position or tilted position of the rotary shelf frame can be firmly maintained, so that the next unloading operation of the lower tray can be carried out safely. .

(2) Since the slider member and coil spring are internally housed within the band-shaped lock body without protruding outside, there is no need for the worker to come into contact with the lock, so there is no need to worry about the lock coming off, and the lock is compactly packed. It is also easy to assemble.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of a conventionally known cam type lock stay, FIGS. 2 to 7 show an embodiment of the slider type lock stay according to the present invention, and FIGS. A schematic plan view showing the locked state; FIGS. 4 and 5 are side views as before;
6 and 7 are schematic plan views showing the unlocked state and reset state, FIG. 8 is a plan view and side view of the slider member, and FIG. 9 is a plan view and side view showing the mounting plate of the coil spring. , FIG. 10 is a side view of the cover, FIG. 11 is a perspective view when the lock stay according to the present invention is installed between the fixed shelf frame and the rotating shelf frame of a multi-shelf car, and FIG. 12 is a side view of the cover.
The figure is a perspective view of the lock stay installation details, seen from the back side. Note that the correspondence relationship between the main parts shown and the symbols is as follows. DESCRIPTION OF SYMBOLS 11... Belt-shaped lock body, 12... Slider member, 13... Fixed side mounting bracket, 14... Movable side mounting bracket, 15... Reset lever lever, 17
...Sliding guide groove, 18...Curved guide groove, 20...
Locking recess, 24... Lever tip, 25... Coil spring, 26... Lever rear end, 28... Slider member end surface, 29, 30... Mounting plate, 33...
...Coil spring, 36...Large roller, 37...
...Small roller, 38...Stepped roller, _f1 ...Fixed shelf frame, _f2 ...Rotating shelf frame.

Claims (1)

[Scope of utility model registration request] A curved guide groove 18 having the same width and located above is continuously formed in a linear sliding guide groove 17 provided approximately in the center of the belt-shaped lock body 11 having a channel-shaped cross section. A hollow box-shaped slider member 12 having a locking recess 20 and a rectangular notch 21 formed therein which corresponds to the shape of the closed end of the curved guide groove is reciprocatably fitted into one end, and the other end is reciprocatably fitted. A fixed side mounting bracket 13 fixed to the fixed shelf frame f ₁ is attached to the end, and a coil spring 25 is wound on the axis of the mounting plate 30 of the slider member and the mounting plate 29 fixed to the belt-shaped lock body. The stepped roller 38 consisting of a large roller 36 and a small roller 37 provided on the movable mounting bracket 14 fixed to the rotating shelf frame f ₂ is inserted into the sliding guide groove, the curved guide groove and the locking recess. At the same time, a reset lever lever 15 is resiliently installed on the band-shaped lock body, and the entire body is covered with a cover 16, so that when the stepped roller moves in the locking direction, the large roller When the small roller comes into contact with the connecting portion 41 between the curved guide groove and the sliding guide groove at the same time as it comes into contact with the locking recess, it becomes locked, and the stepped roller moves upward to reach the unlocked position. When the lever rear end 26
acts as a stopper by abutting against the end surface 28 of the slider member, and the reverse movement of the stepped roller pushes up the lever tip 24, releasing the stopper action and bringing it into the reset state. Features a lock stay.