JP3290403B2 - Conveyor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyor, and more particularly, to a conveyor comprising frames on both left and right sides of a conveyor body, and a mounting groove for housing a nut body formed along a side surface of the frame. About.

[0002]

2. Description of the Related Art Conventionally, in a conveyor such as a belt conveyor or a roller conveyor, both left and right frames constituting a conveyor body are arranged in parallel at appropriate intervals, and are provided on the side surfaces of the left and right frames. Along the entire length of the frame, a mounting groove for mounting a nut is formed along the entire length of the frame, and a nut body is provided at an arbitrary position in the mounting groove. The above-mentioned nuts are used to screw and fix supporting parts such as stoppers, guides, inverters, drive units and fixing portions of the device to the left and right frames.

[0003]

As shown in FIG. 10, the conveyer in which the mounting groove 102 for inserting the fixing nut 103 is recessed over the entire length of the side surfaces of both the left and right frames 101 as described above. Nut 1 for fixing above
03 around the nut 103 so as to prevent the rotation of the
The mounting groove 10 is formed as a substantially T-shaped groove having a width between surfaces.
2 are constituted. A bolt 105 is screwed into the nut 103 inserted into the mounting groove 102 from the side surface of the frame 101, and a support component 104 or the like is tightened between the bolt 105 and the nut 103, thereby connecting the support component 104 to the frame. It is attached and fixed to the side surface of 101.
On the other hand, when the nut 103 is inserted into the mounting groove 102 as described above, the mounting groove 10
The nut 103 was inserted by inserting the nut 103 from the end face of No. 2 and moving to a predetermined mounting position while sliding in the mounting groove. Therefore, in the conventional conveyor as described above, the mounting operation of the fixing nut 103 is very troublesome. In addition, in order to mount a new support component 104 or device, a nut 103 for fixing the same is mounted on the frame 10.
In the case of mounting in an additional form in the mounting groove 102, more troublesome work is required. That is, after loosening and removing all the screws of the nuts and bolts that fix the existing parts and devices attached and fixed to the frame 101, the newly added nut 103 is attached to the mounting groove 102 as described above. It is necessary to insert the nut 103 into a predetermined position by inserting it through the end face opening, and it takes a great deal of time to mount the nut 103 later.

[0004] Therefore, some conventional conveyors are constructed so that they can be inserted into the mounting groove recessed in the frame from an open portion on the side surface in order to save the above-mentioned work. JP-A-4-266308). This conveyor is configured such that a nut is inserted from an open portion on the side surface of the mounting groove by securing a large depth inside the mounting groove recessed into a substantially C shape, and the conveyor can be mounted in the mounting groove in a non-rotatable state. Things.

[0005] In recent years, various production facilities such as semiconductors and electronic precision parts have been installed in a highly dust-free room called a clean room, and the above-mentioned conveyer is also used for constituting the transfer line. I have. Conveyors used in the above-mentioned clean rooms are required to reduce dust generated during operation as much as possible and to have a structure in which dust hardly accumulates in each part of the conveyor in order to increase the degree of dust in the room. Have been. On the other hand, apart from this, in food factories, etc., there is a concern that food contamination by bacteria and pathogens such as O-157 may occur. In recent years, HACCP (hazard analysis, important control points) has been introduced. It is being actively performed. Therefore, it is difficult for the conveyor frame to accumulate dust and scum generated during the production of food.
There is a demand for a structure that can easily clean dust and food debris accumulated in grooves and the like.

However, in the conventional conveyor as described above, the mounting grooves 102 of the nuts 103 that are recessed along the frame 101 are formed to have a substantially T-shaped cross section. Dust, material residue, and the like easily accumulate in the mounting groove 102 at the corners of. Further, even when these dusts and debris accumulate in the mounting groove 102, the lower edge and the upper edge of the open portion hinder the cleaning operation. In many cases, dust and scum of material accumulate in the corners between the part and the bottom surface, causing a state of sticking.

An object of the present invention is to provide a conveyor as described above, which has a function of inserting and removing a nut into and from a mounting groove recessed along both right and left frames from the open side of the mounting groove. Another object of the present invention is to provide a conveyor in which dust and the like hardly accumulate in the device groove, and which can easily clean dust and the like accumulated in the mounting groove.

[0008]

In order to solve the above-mentioned problems, the present invention has a structure in which a frame is disposed on both left and right sides of a conveyor surface of a conveyor body, and a nut body is provided along a side surface of the frame. In a conveyor in which a mounting groove to be mounted is recessed along the longitudinal direction of the frame, and a nut body is installed and locked at an arbitrary position in the mounting groove, the mounting groove is provided at an opening of the groove. The locking edge is made to hang down along the upper edge, and an inclined surface is formed along the lower edge of the opening of the mounting groove, and an open portion between the inclined surface and the lower end of the locking edge is defined by a predetermined angle. A nut having a predetermined shape is inserted into the mounting groove from the insertion opening, and the upper portion of the nut can be locked to the inside of the locking edge, and the mounting groove It is configured so that the nut body mounted inside can be taken out from the same insertion port. That.

According to the above-described means, the mounting groove recessed along the side surfaces of both the left and right frames has the locking edge hanging down along the upper edge of the opening of the groove, and the opening of the mounting groove. An inclined surface is formed along the lower edge. An insertion opening having a predetermined width is provided between the inclined surface and the lower end of the locking edge. Accordingly, the bottom surface of the mounting groove is continuous with the inclined surface, and the bottom surface of the mounting groove is opened by the insertion opening formed between the inclined surface and the lower end of the locking edge.

[0010] From the above-mentioned insertion port, a nut body having a predetermined shape can be inserted into the mounting groove so as to be inserted obliquely from below the insertion port. The nut body having the predetermined shape described above is a nut body configured to be inserted from the insertion port without being caught in the mounting groove. As described above, the nut body inserted into the mounting groove from the insertion opening has the lower surface in contact with the bottom in the mounting groove, and the upper part of the nut body is locked inside the locking edge. This locking relationship can prevent the nut body from falling out of the mounting groove. Also, when a bolt for attaching and fixing a supporting part and a fixing portion of the device is screwed and tightened to the nut body in the state of being housed in the mounting groove as described above, the upper part of the nut body is the above-mentioned locking edge. It is crimped on the inside and the bolt can be tightened.

Conversely, when the bolts tightened as described above are loosened and removed, the nut body housed in the mounting groove is taken out from the insertion opening while being inclined obliquely downward along the inclined surface. be able to.

According to a second aspect of the present invention, there is provided a conveyor, wherein an engagement structure for detachably engaging the inner side of the engaging edge of the mounting groove and the upper part of the nut body in an engaging relationship by unevenness is provided. It is provided between the inner part of the retaining edge and the upper part of the nut body.

In this case, when the nut body is inserted into the mounting groove from the insertion opening, the engagement structure formed by the unevenness formed on the upper part of the nut body is engaged, and the upper part of the nut body is engaged with the locking edge. Locked while engaged from inside. As described above, when the engagement structure formed by the unevenness provided on the upper part of the nut body and the locking edge is engaged, the upper part of the nut body housed in the mounting groove is stably held through the engagement relationship. Therefore, it is possible to prevent the nut body once inserted into the mounting groove from slipping out of the insertion opening and falling off.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. The conveyor shown in FIGS.
It is a relatively small belt conveyor. The above-mentioned belt conveyor comprises both left and right frames 1a,
1b is disposed on both left and right sides of the endless belt 2 constituting the transport surface a1. The left and right frames 1
Reference numerals a and 1b are connected in parallel in a plan view via a substantially flat connecting plate 3 which supports the forward path side of the belt 2 constituting the conveying surface a1 from below (FIGS. 2A and 3).

At both ends of the left and right frames 1a and 1b connected in parallel as described above, a folding roller 4 is provided.
a, 4b, and a transfer surface a between the rollers 4a, 4b.
The belt 2 constituting 1 is stretched. Further, as described above, the forward side of the belt 2 bridged between the rollers 4a and 4b is supported from below by the connecting plate 3, and maintains a horizontal plane. The return side of the belt 2 is drawn into a drive unit 5 provided below the frames 1a and 1b, and a drive roller 5b provided in the drive unit 5 is provided.
It is hung over. The drive roller 5b is connected to a drive motor 5a through an endless chain 5c, and is configured to rotate the belt 2 by the drive rotation of the drive motor 5a (FIG. 1). In addition, the belt conveyor configured as described above is configured so that the transport surface a1 is maintained at a predetermined height horizontally by being installed on the legs 6a and 6b.

A nut body 1 is provided on both inner and outer sides of the left and right frames 1a, 1b of the belt conveyor constructed as described above.
The mounting groove 20 for mounting the frame 0 is recessed along the longitudinal direction of the frames 1a and 1b (FIG. 2A). Mounting groove 2
Reference numeral 0 denotes a nut part 10 into which a fixing bolt 8 used for fixing a supporting part to be mounted and supported on the left and right frames 1a and 1b and a fixing part of the apparatus are screwed. It is intended to be mounted at an arbitrary position. The mounting groove 20 of this embodiment is provided with the two frames 1a, 1
2b are recessed in parallel on both left and right sides (FIG. 2).
a, FIG. 3). Further, in this embodiment, mounting grooves 7a for inserting normal nuts 7 are formed in the lower surfaces of the left and right frames 1a and 1b. The mounting groove 7a is configured as a groove having a substantially T-shaped cross section similar to the conventional one.

As shown in FIG.
Is concavely formed in a substantially U-shaped section so that the nut body 10 is inserted. A locking edge 21 is hung down along the upper edge of the opening of the mounting groove 20. The locking edge 21 is formed over the entire length of the frames 1a and 1b along the upper edge of the mounting groove. An inclined surface 23 is formed along the lower edge of the opening of the mounting groove 20. The inclined surface 23 is formed so as to be continuous with the bottom surface 20a in the mounting groove 20, and is formed so as to be inclined downward toward the side surfaces of the frames 1a and 1b.

Between the inclined surface 23 and the lower edge of the locking edge 21, an insertion port 22 for inserting a nut body 10 described later is formed. The insertion opening 22 forms an open portion on the side surface of the mounting groove 20, and is formed to have a width that allows a nut body 10 described later to be inserted and taken out. The mounting groove 20 as described above is used for the frames 1a, 1b.
The upper and lower portions are formed in parallel to each other along the inner and outer side surfaces.

On the other hand, the nut body 10 to be mounted in the mounting groove 20 is formed by extruding a metal material such as aluminum, a synthetic resin, or the like with a predetermined cross section, and forming the extruded material to a required width. It is cut into pieces. Further, a female screw hole 11 for screwing the fixing bolt 8 is formed in a substantially central portion of the front surface of the nut body 10.
It penetrates the back side of the nut body 10.

The vertical dimension of the nut body 10 is
The height is set to be slightly smaller than the inside height (FIG. 2A). As a result, the nut body 10 is placed in the mounting groove 2.
In a state where the mounting groove 20 is mounted, the lower surface portion is fixed on the bottom surface 20 a in the groove 20, and an appropriate clearance is generated between the lower surface portion and the upper portion of the mounting groove 20. The depth of the nut body 10 is set to be slightly smaller than the dimension from the inner surface of the locking edge 21 to the inner wall of the mounting groove 20. Further, the width of the nut 10 is set to be substantially the same as the length of the nut 10. That is, the nut body 10 is formed so as to be substantially square in a front view.

The upper portion of the nut body 10 on the front side has a notch formed with a locking groove 12 fitted from the inside to a locking edge 21 of the mounting groove 20. The locking groove 12 functions so that the nut body 10 can be inserted smoothly without being caught when the nut body 10 is inserted into the mounting groove 20. In addition, the locking groove 12
When the nut body 10 is fitted in the mounting groove 20 from the inside with the nut body 10 mounted in the mounting groove 12 and the fixing bolt 8 is tightened, the nut body The upper part of 10 is pressed against the locking edge 21 in a stable state. Further, the front corner of the locking groove 12 of the nut body 10 and the lower corner of the rear surface of the nut body 10 are cut off obliquely to form a cut portion 13. Nut body 1
0 is the mounting groove 2 by providing the cut portion 13.
The work of inserting into the inside of the zero can be performed more smoothly.

When mounting the nut body 10 in the mounting groove 20, the nut body 10 is inserted into the insertion opening from the upper end side (FIG. 4A). At this time, when the nut body 10 is inserted so as to be pushed up obliquely from below along the inclined surface 23 of the mounting groove 20, the nut body 10 can be smoothly inserted (FIG. 4).
b). When the nut body 10 is inserted into the mounting groove 20 as described above, the lower surface of the nut body 10 is placed on the bottom surface 20a in the mounting groove 20, and the locking groove 12 above the nut body 10 is mounted. It is held in contact with the locking edge 21 of the groove 20 from the inside, so that the fixing bolt 8 can be screwed (FIG. 4C).

As described above, the nut 1 is inserted into the mounting groove 20.
0, the mounting component b to be fixed is brought into contact with the side surfaces of the frames 1a and 1b on which the nut body 10 is mounted, and the fixing bolt 8 is inserted into the fixing hole b1 of the mounting component b. The screw is screwed in accordance with the female screw hole 11 of the nut body 10 (FIG. 3). Before completely tightening the bolt 8, the mounting component b is slid to a predetermined mounting position to accurately position the bolt 8, and then the bolt 8 is completely tightened to be mounted and fixed. Bolt 8 as described above
When the nut is tightened, the locking groove 12 on the upper part of the nut body 10 is pressed against the locking edge 21 of the mounting groove 20 from the inside, and the mounting part b and the frame 1 a,
The locking edge 21 of FIG. 1b is fastened together (FIG. 2-a).

Also, contrary to the above case, the bolt 8
When removing the mounting component b attached and fixed by the above, the bolt 8 is loosened and removed together with the mounting component b from the frames 1a and 1b, and the nut body 10 mounted in the mounting groove 20 is removed from the insertion opening 22. It can be easily removed by pulling out while inclining diagonally downward along the inclined surface 23.

The dimensions of each part of the nut body described above are as follows:
As long as the nut body can be smoothly inserted into the mounting groove, and can be securely crimped to the locking edge of the mounting groove when the fixing bolt is screwed and tightened as described later. If so, it may be changed arbitrarily. For example, the nut body is shown in FIG.
May be formed like a nut body 10 '. The nut body 10 ′ is configured in the same manner as the above-described nut body 10. It is formed by recessing a relief groove 15 having a shape.

As described above, in the nut body 10 ′ in which the escape groove 15 is recessed at the corner of the locking groove 12, when the nut body 10 ′ is inserted from the insertion opening 22 into the mounting groove 20 as described above. The catch can be more effectively prevented. Also,
In the mounted state of the nut body 10 ′, since the corner inside the lower end of the locking edge 21 is allowed to enter the escape groove 15 of the locking groove 12, for example, a sharp corner at the lower end of the locking edge 21. Abuts on the corner of the locking groove 12 having a substantially L-shaped cross section, thereby creating a gap between the locking edge 21 and the locking groove 12 of the nut body 10 ′, and there is a play between the two members 10 and 21. This can prevent problems such as the occurrence of.

On the other hand, as described above, both the left and right frames 1a,
1b, the bottom surface 20a inside the groove 20 is continuous with the inclined surface 23.
The bottom side of the mounting groove 20 is opened by the insertion opening 22 formed between the mounting groove 20 and the lower end of the locking edge 21. That is, in the mounting groove 20 whose bottom side surface is open as described above, since there is no corner hidden at the bottom of the mounting groove unlike the conventional mounting groove, there is an advantage that dust and the like hardly accumulate in the mounting groove 20. is there. Also, due to long-term use, etc.,
Even if dust or the like accumulates in the inside, the bottom portion 20a
By inserting a brush for cleaning or a suction port of a vacuum cleaner through the insertion port 22 where is opened, dust accumulated on the bottom of the mounting groove 20 can be easily cleaned. In the conveyor of the above-described embodiment, the mounting grooves 20 are recessed on both side surfaces of the left and right frames 1a and 1b. However, the mounting grooves 20 may be recessed on only one of the two side surfaces of the frame. Good. Incidentally, what is shown in FIG. 6 is a mounting groove 7a having a T-shaped cross section in which a mounting groove 20 similar to that described above is recessed only on the outer surfaces of the frames 1a and 1b, and a normal nut 7 is inserted into the inner surface. Is shown in the figure.

The mounting groove and the nut body recessed in the frames 1a and 1b of the conveyor of the present invention may be configured as shown in FIGS. The mounting groove 40 shown in FIGS. 7 and 8 is formed to be concave along the side surfaces of the frames 1a and 1b, similarly to the mounting groove 20 of the belt conveyor described above.

The mounting groove 40 has a substantially concave cross section so that the nut body 30 is inserted. A locking edge 41 is hung down along the upper edge of the opening of the mounting groove 40. The locking edge 41 is formed over the entire length of the frames 1a and 1b along the upper edge of the mounting groove 40 in the same manner as described above. An inclined surface 43 is formed along the lower edge of the opening of the mounting groove 40. The inclined surface 43 also serves as a bottom surface in the mounting groove 40, and is formed as a concave arc surface that is inclined downward toward the outside of the frames 1a and 1b.

An insertion opening 42 for inserting the nut body 30 is formed between the inclined surface 43 and the lower edge of the locking edge 41. The insertion opening 42 is formed to have a width that allows a nut 30 to be described later to be inserted into and taken out of the mounting groove 40. On the inner surface side of the locking edge 41 in the mounting groove 40, a concave portion 44b and a convex portion 44a that engage with the nut body 30 described later are formed. The above-mentioned convex portion 44a is formed so as to protrude in a substantially mountain-shaped cross section along the inside of the lower edge of the locking edge 41. The concave portion 44b is a groove provided along the upper side of the convex portion 44a on the inner surface side of the locking edge 41, and is fitted with a convex portion 32a of the nut body 30 described later.

On the other hand, the nut body 30 mounted in the mounting groove 40 is formed by extruding a metal material such as aluminum or a synthetic resin with a predetermined cross section and cutting the extruded material to a required width. I have. A female screw hole 31 for screwing the fixing bolt 8 is formed substantially at the center of the nut body 30.

A groove 33 corresponding to the thickness of the locking rim 41 is formed in the upper portion on the front side of the nut body 30.
A convex portion 32a having a substantially mountain-shaped cross section is formed along an upper edge portion of the groove portion 33, and the locking edge 41 is formed below the convex portion 32a.
The concave portion 32b that fits with the convex portion 44a provided on the inner surface of is formed. That is, the concave portion 32b and the convex portion 32a of the nut body 30 are combined with the concave portion 44b formed on the inner surface of the locking edge 41 when the nut body 30 is inserted into the mounting groove 40.
And the protrusions 44a are fitted and engaged in a state where they substantially match each other (FIG. 7). That is, the protrusions 32 a and the recesses 32 b of the nut body 30 and the protrusions 44 on the inner surface of the locking edge 41 are provided.
a, the concave portion 44b constitutes a locking structure for removably locking the upper portion of the nut body 30 and the inner surface of the locking edge 41 by an engagement relationship by fitting the concave and convex portions of the two to each other. I do.

On the lower surface of the nut body 30, there is formed a convex arcuate surface 35 which abuts on the inclined surface 43 constituting the bottom surface in the mounting groove 40 in a substantially conforming manner. Further, a cut portion 34 which is notched obliquely is formed at an upper corner on the rear side of the nut body 30 so that the operation of inserting the nut body 30 into the mounting groove 40 can be performed more smoothly. It is composed.

When the nut body 30 configured as described above is mounted in the mounting groove 40, the nut body 30 is
a, Insert into the insertion opening 42 from the upper part where the recess 32b is formed (FIG. 9A). At this time, the nut body 30 is inserted so as to be pushed up obliquely from below along the inclined surface 43 of the mounting groove 40 formed in an arc shape (FIG. 9B). Also, when inserting the nut body 30 as described above,
The lower circular arc surface 35 of the nut body 30 slides in a form guided along the inclined surface 43 in the mounting groove 40 formed as a concave circular arc surface. At the same time, the operation of inserting the nut body 30 is performed smoothly.

Further, the nut body 30 inserted into the mounting groove 40 as described above is placed in a state where the lower arc surface conforms to the inclined surface 43 of the mounting groove 40 so as to obtain a stable mounting state. . At the same time, the convex portion 32a formed on the upper portion of the nut body 30 is fitted into the concave portion 44b provided on the inner surface of the locking edge 41, and the concave portion 32b of the nut body 30 is mutually engaged with the convex portion 44a on the inner surface of the locking edge 41. Fit. Then, due to the fitting relationship due to the unevenness, the upper portion of the nut body 30 can be locked in a stable state with respect to the inner surface of the locking edge 41 (FIG. 9C). As a result, it is possible to prevent the nut body 30 once inserted into the mounting groove 40 from slipping off and falling off, and when the fixing bolt 8 is tightened, the upper part of the nut body 30 becomes the locking edge. It is possible to securely press the inner surface 41 in a stable state.

That is, when the nut body 30 is inserted into the mounting groove 40 as described above, the lower surface of the nut body 30 is
0 on the inclined surface 43 and the nut body 3
0 The mounting groove 40 is formed by the above-mentioned locking structure by the unevenness.
Is held in contact with the locking edge 41 from the inside. Then, the nut body 30 in the mounted state can maintain a state in which the female screw hole 31 in the front part is exposed from the insertion opening 42 and the fixing bolt 8 can be screwed.

As described above, the nut body 30 is attached to the mounting groove 40.
Once mounted, the mounting component b to be fixed is brought into contact with the side surfaces of the frames 1a and 1b on which the nut body 30 is mounted, and the fixing bolt 8 is inserted and screwed and tightened in the same manner as described above. . When the bolt 8 is tightened, the convex portion 32a and the concave portion 32b on the upper portion of the nut body 30 are pressed against each other with the concave portion 44b and the convex portion 44a provided on the inner surface of the locking edge 41 being fitted to each other. The mounting part b and the locking edge 41 of the frames 1a, 1b can be fastened together between the bolt and the bolt 8 (FIG. 8).

As described above, each of the mounting grooves 40 recessed in the side surfaces of the left and right frames 1a and 1b is constituted by an inclined surface 43 in which the bottom surface inside the groove 40 is entirely concave. The bottom side surface of the mounting groove 40 is opened by the insertion opening 42 formed between the lower end 43 and the locking edge 41.

The inclined surface 4 formed in an arc shape as described above
In the mounting groove 40 in which the side surface of the mounting groove 3 is open, there is no corner at the bottom in the groove 40, so that dust and the like hardly accumulate on the bottom in the mounting groove 40. Further, even when dust or the like accumulates in the mounting groove 40, as described above, the inclined surface 4
By inserting a brush for cleaning or a suction port of a vacuum cleaner through an insertion opening 42 that opens the side surface of the third unit 3, dust and the like accumulated at the bottom of the mounting groove 40 can be easily and effectively cleaned.

According to the gist of the present invention, the shape and size of the locking rim, the inclined surface, the insertion port, etc. of the mounting grooves formed in the side surfaces of both the left and right frames depend on the shape and size of the nut body. It may be arbitrarily changed correspondingly. Also, the form of the nut body to be mounted in the mounting groove is also inserted into the mounting groove from the insertion port,
The nut body upper portion may be arbitrarily changed as long as it can be locked from the inside with respect to the locking edge. In particular, the width of the nut body (longitudinal direction of the mounting groove) can be set (increased / decreased) arbitrarily in accordance with the shape and size of the mounting part to be mounted and fixed to the frame and the fixed part of the device, thereby achieving various The mounting parts and the fixed parts of the device can be securely mounted. However, when changing the shape and size of the nut body as described above, as shown in FIG. 2B, the dimension of the nut body 10 excluding the clearance L2 from the thickness dimension L is the depth of the inclined surface 23. It is necessary to set the dimension to be larger than the dimension L1 (that is, to keep the condition of L−L2> L1), so that the bottom surface of the nut body 10 is On top of
The nut body 10 is configured not to slide down along the inclined surface 23.

In the above embodiment, two mounting grooves 20 and 40 are provided on both the inner and outer side surfaces of the left and right frames 1a and 1b, respectively. However, recesses are provided on the side surfaces of the left and right frames 1a and 1b. The number of mounting grooves to be formed is not limited to two, but may be one or more. Further, the mounting groove may be recessed in only one of the outer surface and the inner surface of both the left and right frames. Although the above embodiment has described the case where the present invention is implemented on a belt conveyor, the present invention is not limited to a belt conveyor, and a roller conveyor or the like may be used as long as the conveyor has a frame on both left and right sides across a transport surface. It may be.

[0042]

As described above, according to the present invention, a mounting groove for mounting a nut body is recessed along the longitudinal direction of the frame along the side surfaces of the left and right frames, and the nut body is inserted in the mounting groove. In the conveyor which is internally fitted and locked, the mounting groove has a locking edge hanging down along an upper edge of an opening of the groove, and an inclined surface is formed along a lower edge of the mounting groove, An insertion port is formed between the inclined surface and the lower end of the locking edge, and a nut body is inserted into the mounting groove from the insertion port to lock an upper portion of the nut body inside the locking edge. It is possible to take out the nut body from inside the mounting groove.

In the above-mentioned conveyor, when the supporting parts and the fixed parts of the apparatus are fixed to both the left and right frames by using bolts, the nut body to which the fixing bolts are screwed is attached. It can be inserted very easily at a predetermined position in the mounting groove by inserting it from the insertion opening on the side surface of the groove. Therefore, there is no need to insert nuts for screwing the mounting bolts into the mounting grooves of the left and right frames in advance as in the conventional conveyor. As described above, it is possible to easily screw the fixing bolt by mounting the nut body later.

The mounting groove has an inner bottom surface connected to the inclined surface (or the inclined surface itself serving as a bottom surface), and an insertion opening formed between the inclined surface and the lower end of the locking edge forms the mounting groove. Since the bottom side surface is open, dust and the like hardly accumulate in the mounting groove. Further, even when dust or the like accumulates in the mounting groove, a brush for cleaning or a suction port of a vacuum cleaner is inserted from the bottom side surface of the mounting groove which is opened as an insertion port as described above, and the dust collects in the mounting groove. Dust can be easily and effectively cleaned.

According to a second aspect of the present invention, there is provided a conveyor according to the first aspect of the present invention, wherein:
Since the engagement structure is provided so as to be detachably engaged by the engagement relationship due to the unevenness, when the nut body is inserted into the mounting groove from the insertion opening, the engagement formed by the unevenness formed on the upper part of the nut body. The mating structure is engaged, and the upper portion of the nut body is locked from the inside with respect to the locking edge. as a result,
It is possible to stably hold the upper part of the nut body provided in the mounting groove through the engagement relationship of the engagement structure formed by the unevenness provided on the upper part of the nut body and the locking edge. It is possible to effectively prevent a problem in which the nut body inserted into the inside of the nut falls out of the insertion port. Further, according to the engagement relationship due to the unevenness, when the fixing bolt is screwed into the nut body and tightened, the upper part of the nut body and the inner side of the locking edge can be pressed in a stable state. Therefore, the fastening with the fixing bolt can be performed more reliably.

[Brief description of the drawings]

FIG. 1 is a side view showing a belt conveyor in which the present invention is implemented, with a part thereof omitted.

2 (a) is a sectional view taken along line II-II in FIG. 1,
(B) is a longitudinal sectional view showing a mounting groove portion on which the nut body is mounted, and shows a dimensional relationship between the nut body and an inclined surface of the mounting groove.

FIG. 3 is an exploded perspective view showing a frame, a nut body, a mounting member, and a bolt of the conveyor.

FIG. 4 is a longitudinal sectional view showing a step of inserting a nut body into a mounting groove of a frame, where (a) shows a state in which the nut body is inserted into the mounting groove from an upper end side, and (b) shows the same. Shows the state where the nut body is pushed up into the mounting groove and inserted,
(C) shows a state where the nut body is inserted into the mounting groove.

FIG. 5 is a longitudinal sectional view showing a fastening structure of a frame portion including a nut body having a relief groove formed at a corner of a locking groove.

FIG. 6 is a vertical cross-sectional view showing a frame portion of a conveyor in which a mounting groove is recessed only on one side surface of the frame.

FIG. 7 is a longitudinal sectional view showing a frame portion of a conveyor on which a nut body is mounted by an engagement relationship due to unevenness.

FIG. 8 is an exploded perspective view showing a frame, a nut body, a mounting member, and bolts of the conveyor.

FIG. 9 is a longitudinal sectional view showing a step of inserting a nut body into a mounting groove of the frame, wherein (a) shows a state where the nut body is inserted into the mounting groove from the upper end side, and (b) shows A state where the nut body is pushed up into the mounting groove and inserted is shown, and (c) shows a state where the nut body is inserted into the mounting groove.

FIG. 10 is an exploded perspective view showing a frame portion, a nut, a mounting member, and a bolt of a conventional conveyor.

[Explanation of symbols]

 a: Conveyor body a1: Transfer surface b: Mounting part 1a: Left frame 1b: Right frame 8: Bolt 10, 30, Nut body 11, 31, Female screw Hole 12: locking groove 20, 40: mounting groove 21, 41: locking edge 22, 42: insertion port 23, 43: inclined surface

Claims (2)

(57) [Claims] 1. A frame is provided on both left and right sides of a conveyor surface of a conveyor body, and along a side surface of the frame,
A mounting groove for mounting a nut body is recessed along the longitudinal direction of the frame, and the nut is internally mounted and locked at an arbitrary position in the mounting groove.
The locking edge is made to hang down along the upper edge of the opening of the groove, and a slope is formed along the lower edge of the opening of the mounting groove. The opening between them is configured as an insertion port having a predetermined width, and a nut body of a predetermined shape is inserted from the insertion port into the mounting groove to lock the upper part of the nut body against the inside of the locking edge. A conveyor configured so that the nut body mounted in the mounting groove can be taken out from the insertion slot. 2. An engagement structure for detachably engaging an inner side of a locking edge of a mounting groove and an upper portion of a nut body in an engaging relationship by unevenness, the inner side of the locking edge of the mounting groove. 2. The conveyor according to claim 1, wherein the conveyor is provided between the upper portion of the nut body.